Posts by Cassius

The episode should be released later today. One thing that Joshua brings up tangentially is a reference to Zeno's paradoxes - specifically as to whether Achilles could outrun the tortoise if the tortoise had any head start at all.

In our current context, the important of that is the question of what Zeno was advocating and why. Was he really asserting that Achilles cannot outrun a tortoise? Or was he making the opposite point, and expecting us to make the obvious deduction, that what we see must be taken as more real and more important than what a logical formula divorced from the senses might say?

I don't know that we have discussed that enough, and even if we have in prior conversations, this is a classic challenge to the senses that it would benefit us to highlight somewhere on the forum more so than we do now.

Perhaps all of his 'paradoxes' need the same treatment, the the tortoise one is maybe the best well known.

I would say there is no doubt but that what you are talking about in terms of a "internal existing working model of how the universe operates" is an important aspect of our lives. And I would say there is no doubt but that prolepsis is involved in the formation and operation of that. It might be going too far to say that they are exactly the same thing, but I'd agree that they are closely related.

I feel much the same way on each of your points Matteng. If you are so inclined to make comments here while you are reading the book, I feel sure those would be helpful to the group. The charge of "lack of engagement with society" is in my view not at all warranted, but it has been very damaging to the wider acceptance of Epicurean philosophy and needs to be dealt with aggressively. No self-respecting healthy young person is going to be willing to embrace Epicurean philosophy if they think that doing so requires them to withdraw from the world and "live in a cave." I think most of us here share our disagreement with that charge, to the extent that it seems ridiculous even to talk about the charge as if it were serious, but it certainly is a serious one and much work needs to be invested in driving it away as in VS46:

VS46. Let us utterly drive from us our bad habits, as if they were evil men who have long done us great harm.

Thanks Godfrey! I think pulling these sentences out goes in the same direction. If these stand alone:

Quote

Relative predicates do not have the same status as things said not relatively but in accordance with something’s own nature. Nor does the one kind truly exist but the other not. So to expect them to have the same attributes, or the one kind to exist but the other not, is naive.

... even that is prettty confusing to me but "things said not relatively but in accord with something's own nature" must refer to "gold" and "stone" or such otherwise "real objects" (presumably?)

And I think you are right on point here too, and the "surprise" you mention is why this is so important -- "events" DO seem to be being given the same status of significance to us as "material objects":

Quote from Godfrey

I'm a little surprised by that, because I would think that his position would be that "larger" and "smaller" would just be "events," and therefore not real. At least they would not be material; he seems to be saying that an event is real, even if not material.

If I am reading all this correctly then this reinforces the point that I think a lot of people kick back against, or even refuse to entertain the possibility of --- that the emphasis on dreams during sleep and the visions of madmen as being 'real' are part and parcel of a total overhaul of ways of thinking, in which Epicurus is doubling down that we must consider everything that affects us as being "real" rather than being caught up in the game being played by lots of people (Stoics then and now, lots of others today too) that we shouldn't consider the things that affect us as being "real" unless they have a flesh and blood or fully material existence.

There's a lot at stake in the issue of whether we should require "reality" to have a physical existence in order for us to consider it to be real and to exclude everything that does not possess material existence as "fantasy"

Is this the real life? Is this just fantasy?
Caught in a landslide, no escape from reality...

Welcome Robert

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This forum is the place for students of Epicurus to coordinate their studies and work together to promote the philosophy of Epicurus. Please remember that all posting here is subject to our Community Standards / Rules of the Forum our Not Neo-Epicurean, But Epicurean and our Posting Policy statements and associated posts.

Please understand that the leaders of this forum are well aware that many fans of Epicurus may have sincerely-held views of what Epicurus taught that are incompatible with the purposes and standards of this forum. This forum is dedicated exclusively to the study and support of people who are committed to classical Epicurean views. As a result, this forum is not for people who seek to mix and match some Epicurean views with positions that are inherently inconsistent with the core teachings of Epicurus.

All of us who are here have arrived at our respect for Epicurus after long journeys through other philosophies, and we do not demand of others what we were not able to do ourselves. Epicurean philosophy is very different from other viewpoints, and it takes time to understand how deep those differences really are. That's why we have membership levels here at the forum which allow for new participants to discuss and develop their own learning, but it's also why we have standards that will lead in some cases to arguments being limited, and even participants being removed, when the purposes of the community require it. Epicurean philosophy is not inherently democratic, or committed to unlimited free speech, or devoted to any other form of organization other than the pursuit by our community of happy living through the principles of Epicurean philosophy.

One way you can be most assured of your time here being productive is to tell us a little about yourself and personal your background in reading Epicurean texts. It would also be helpful if you could tell us how you found this forum, and any particular areas of interest that you have which would help us make sure that your questions and thoughts are addressed.

In that regard we have found over the years that there are a number of key texts and references which most all serious students of Epicurus will want to read and evaluate for themselves. Those include the following.

"Epicurus and His Philosophy" by Norman DeWitt

The Biography of Epicurus by Diogenes Laertius. This includes the surviving letters of Epicurus, including those to Herodotus, Pythocles, and Menoeceus.

"On The Nature of Things" - by Lucretius (a poetic abridgement of Epicurus' "On Nature"

"Epicurus on Pleasure" - By Boris Nikolsky

The chapters on Epicurus in Gosling and Taylor's "The Greeks On Pleasure."

Cicero's "On Ends" - Torquatus Section

Cicero's "On The Nature of the Gods" - Velleius Section

The Inscription of Diogenes of Oinoanda - Martin Ferguson Smith translation

A Few Days In Athens" - Frances Wright

Lucian Core Texts on Epicurus: (1) Alexander the Oracle-Monger, (2) Hermotimus

Philodemus "On Methods of Inference" (De Lacy version, including his appendix on relationship of Epicurean canon to Aristotle and other Greeks)

"The Greeks on Pleasure" -Gosling & Taylor Sections on Epicurus, especially the section on katastematic and kinetic pleasure which explains why ultimately this distinction was not of great significance to Epicurus.

It is by no means essential or required that you have read these texts before participating in the forum, but your understanding of Epicurus will be much enhanced the more of these you have read. Feel free to join in on one or more of our conversation threads under various topics found throughout the forum, where you can to ask questions or to add in any of your insights as you study the Epicurean philosophy.

And time has also indicated to us that if you can find the time to read one book which will best explain classical Epicurean philosophy, as opposed to most modern "eclectic" interpretations of Epicurus, that book is Norman DeWitt's Epicurus And His Philosophy.

(If you have any questions regarding the usage of the forum or finding info, please post any questions in this thread).

Welcome to the forum!

Here is the part of Dr. Sedley's commentary that appears right after the quote that is included under "Part 1" in the post above. Explaining or giving examples of the the last underlined sentence below (especially as to "relative predicates") would be particularly helpful.

Quote

The opponents can be seen to draw heavily on Platonic dialectical materials in order to launch their attack on the reality of values, in particular in their contrast between the universally agreed determinate nature exhibited by minerals and the cultural relativity of values. As one might expect of the New Academy, this sceptical argument borrows its materials freely from the text of Plato (Phaedrus, 263a, cf. also Euthyphro, 7b-d, Theaetetus, 172b). More remarkable is how Polystratus, in his reply, appears himself to draw inspiration from Plato – a strategy with all the more ad hominem force when directed against Plato’s own self-declared successors. Plato had indeed never intended by this contrast between minerals and values to impugn the reality of the latter, any more than he had meant to infer from the relativity of large(r) and small(er) to their unreality. On the contrary, at Sophist 255c he had presented an exhaustive division of beings (ὄντα) into absolute and relative, a bicategorial scheme which became formal Academic doctrine under his second successor Xenocrates (F15 Isnardi Parente 2 ). Much the same stance as Plato’s own is developed by Polystratus as a rebuttal of the contemporary Academy. He resourcefully points out that the mere existence of an ontological difference between the two categories does not entail that one or other of them will fall short of reality. Anyone who thinks otherwise, he ingeniously adds, could as easily argue that, since such relative predicates as beneficial and harmful manifestly are part of the structure of reality, it must be the non-relative items such as minerals that are unreal!

As we prepare this week's recording for broadcast it looks like I may need to do some particular slicing in regard to the time we spent on David Sedley's "Point 1" as to Ontological argument in the post immediately above. The argument apparently revolves around the alleged differences between two classes, which appear to be(1) a class that includes "relative terms" vs (2) a class that includes gold and stones.

Apparently the difference between these two classes was being used by the Skeptics to argue that the senses are not real, but Sedley says that the Epicurean was able to turn the argument on its head and use it to show that the argument could just as well prove the reverse.

What is not so clear to me is which class the skeptics were saying was "real," and why. Seems I have read that Plato held that the "idea" of a horse is real, but individual horses 10 feet in front of us we can't be sure of. It therefore may be that the Skeptics were arguing that the relative terms are real, but the gold and stone or not. And in particular, there is something going on about how people perceive the same thing differently under different circumstances. But what's not clear on quick reading is whether what is being perceived differently are the relative terms or the solid objects. And it's even less clear how the argument could be turned on its head to show allegedly the opposite position. But then maybe the reason it's not clear has something to do with how the argument can be used for either side of the question.

If anyone has time to look at this part of the article and attempt to place the argument in simpler terms that would be great. i intend to take a look at this over the next several days to be sure that the podcast discussion that we release doesn't conflict with our best reading of this fairly tricky subject.

Thank you MaiTaiNye! It's seems pretty clear you are real person so take your time and look around and comment further whenever you're ready.

I haven't had a chance to read this one yet, but looks directly on point with our discussion here in this forum:

Happiness despite Mortality: Epicurus' Preparation against Death and Pain in Cic. Tusc. 5.88f

A a close reading of Cic. Tusc. 5.88f., which draws on well known source texts to set out Epicurean reasons why death and pain are no impediments to perfect…

www.academia.edu

Thank you MaiTaiNye for your post (now moved into this thread as post number 1 above), which you posted before we got your Welcome thread up.

Please let us know a little more about yourself and your interests here in this thread.

Welcome MaiTaiNye

Please check out our Getting Started page, but in the meantime there is one last step to complete your registration:

All new registrants must post a response to this message here in this welcome thread (we do this in order to minimize spam registrations).

You must post your response within 72 hours, or your account will be subject to deletion.

Please say "Hello" by introducing yourself, tell us what prompted your interest in Epicureanism and which particular aspects of Epicureanism most interest you, and/or post a question.

This forum is the place for students of Epicurus to coordinate their studies and work together to promote the philosophy of Epicurus. Please remember that all posting here is subject to our Community Standards / Rules of the Forum our Not Neo-Epicurean, But Epicurean and our Posting Policy statements and associated posts.

Please understand that the leaders of this forum are well aware that many fans of Epicurus may have sincerely-held views of what Epicurus taught that are incompatible with the purposes and standards of this forum. This forum is dedicated exclusively to the study and support of people who are committed to classical Epicurean views. As a result, this forum is not for people who seek to mix and match some Epicurean views with positions that are inherently inconsistent with the core teachings of Epicurus.

All of us who are here have arrived at our respect for Epicurus after long journeys through other philosophies, and we do not demand of others what we were not able to do ourselves. Epicurean philosophy is very different from other viewpoints, and it takes time to understand how deep those differences really are. That's why we have membership levels here at the forum which allow for new participants to discuss and develop their own learning, but it's also why we have standards that will lead in some cases to arguments being limited, and even participants being removed, when the purposes of the community require it. Epicurean philosophy is not inherently democratic, or committed to unlimited free speech, or devoted to any other form of organization other than the pursuit by our community of happy living through the principles of Epicurean philosophy.

One way you can be most assured of your time here being productive is to tell us a little about yourself and personal your background in reading Epicurean texts. It would also be helpful if you could tell us how you found this forum, and any particular areas of interest that you have which would help us make sure that your questions and thoughts are addressed.

In that regard we have found over the years that there are a number of key texts and references which most all serious students of Epicurus will want to read and evaluate for themselves. Those include the following.

"Epicurus and His Philosophy" by Norman DeWitt

The Biography of Epicurus by Diogenes Laertius. This includes the surviving letters of Epicurus, including those to Herodotus, Pythocles, and Menoeceus.

"On The Nature of Things" - by Lucretius (a poetic abridgement of Epicurus' "On Nature"

"Epicurus on Pleasure" - By Boris Nikolsky

The chapters on Epicurus in Gosling and Taylor's "The Greeks On Pleasure."

Cicero's "On Ends" - Torquatus Section

Cicero's "On The Nature of the Gods" - Velleius Section

The Inscription of Diogenes of Oinoanda - Martin Ferguson Smith translation

A Few Days In Athens" - Frances Wright

Lucian Core Texts on Epicurus: (1) Alexander the Oracle-Monger, (2) Hermotimus

Philodemus "On Methods of Inference" (De Lacy version, including his appendix on relationship of Epicurean canon to Aristotle and other Greeks)

"The Greeks on Pleasure" -Gosling & Taylor Sections on Epicurus, especially the section on katastematic and kinetic pleasure which explains why ultimately this distinction was not of great significance to Epicurus.

It is by no means essential or required that you have read these texts before participating in the forum, but your understanding of Epicurus will be much enhanced the more of these you have read. Feel free to join in on one or more of our conversation threads under various topics found throughout the forum, where you can to ask questions or to add in any of your insights as you study the Epicurean philosophy.

And time has also indicated to us that if you can find the time to read one book which will best explain classical Epicurean philosophy, as opposed to most modern "eclectic" interpretations of Epicurus, that book is Norman DeWitt's Epicurus And His Philosophy.

(If you have any questions regarding the usage of the forum or finding info, please post any questions in this thread).

Welcome to the forum!

Four Points From Sedley Article: "Epicurean Theories Of Knowledge"

(Posting these following excerpts (quotes except for the headings) mainly as a summary of points we may want to include in Episode 243 before proceeding with more text).

Note:

During the 260s BC Arcesilaus succeeded to the headship of the Academy, and under his influence the formerly doctrinal Platonist school veered away from dogma, instead adopting towards rival schools an essentially critical, dialectical stance. It seems to have been during that early phase of the sceptical New Academy that Colotes, who had been an intimate of Epicurus, wrote his treatise entitled The impossibility of life itself according to other philosophers (meaning, of course, other than Epicurus), about whose content we learn from Plutarch’s polemical counterblast in his own Against Colotes. None of Colotes’ chosen targets – Democritus, Parmenides, Empedocles, Socrates, Melissus, Plato, Stilpo, the Cyrenaics and Arcesilaus – were criticised for their ethical positions, as one might have predicted, but entirely for the support that their epistemology and metaphysics allegedly lent to scepticism, and specifically, to scepticism about human cognitive access to physical reality. 7 The last target attacked by Colotes, though anonymous, is unerringly recognized by Plutarch as the New Academy of Arcesilaus, presented as advocating universal suspension of judgement (ἐποχή). Yet, intriguingly, there is reason to think that the treatise was composed, not in the vicinity of the Athenian Academy, but in Alexandria. This much is suggested by its opening dedication to Ptolemy II (Plutarch., Adv. Col., 1107E), and by a flattering peroration in which the Alexandrian king was warned against the dangers to law and order posed by the ruinous non-Epicurean philosophies listed (1124C). We should infer that the felt need for Epicureans to counterattack Academic scepticism was not just an Athenian preoccupation but was spreading to the courts of major Hellenized cultural centres, where the patronage of the local dynasty might well be hotly competed for.

Point 1 - Ontological Arguments Are Not Determinative

Text: Or do you think, on the basis of the foregoing argument, that someone would not suffer the troubles which I mention but rather would make it convincing that fair, foul and all other matters of belief are falsely believed in, just because unlike gold and similar things they are not the same everywhere? After all, it must stare everybody in the face that bigger and smaller are also not perceived the same everywhere and in relation to all magnitudes […] So too with heavier and lighter. And the same applies also to other powers, without exception. For neither are the same things healthy for everybody, nor nourishing or fatal, nor the opposites of these, but the very same things are healthy and nourishing for some yet have the opposite effect on others. Therefore either they must say that these too are false – things whose effects are plain for everyone to see – or else they must refuse to brazen it out and to battle against what is evident, and not abolish fair and foul as falsely believed in either, just because unlike stone and gold they are not the same for everybody […] Relative predicates do not have the same status as things said not relatively but in accordance with something’s own nature. Nor does the one kind truly exist but the other not. So to expect them to have the same attributes, or the one kind to exist but the other not, is naive. And there is no difference between starting from these and eliminating those and starting from those and eliminating these: it would be similarly naive to think that since the bigger and heavier and whiter and sweeter are bigger than one thing but smaller than another, and heavier, and likewise with the other attributes, and since nothing has the same one of these attributes per se as it has in relation to something else, in the same way stone, gold and the like ought also, if they truly existed, likewise to be gold in relation to one person while having the opposite nature in relation to another; and to say that, since that is not the case, these things are falsely believed in and do not really exist (On irrational contempt, XXIII, 26- XXVI, 23). 9

1. The opponents can be seen to draw heavily on Platonic dialectical materials in order to launch their attack on the reality of values, in particular in their contrast between the universally agreed determinate nature exhibited by minerals and the cultural relativity of values. As one might expect of the New Academy, this sceptical argument borrows its materials freely from the text of Plato (Phaedrus, 263a, cf. also Euthyphro, 7b-d, Theaetetus, 172b). More remarkable is how Polystratus, in his reply, appears himself to draw inspiration from Plato – a strategy with all the more ad hominem force when directed against Plato’s own self-declared successors. Plato had indeed never intended by this contrast between minerals and values to impugn the reality of the latter, any more than he had meant to infer from the relativity of large(r) and small(er) to their unreality. On the contrary, at Sophist 255c he had presented an exhaustive division of beings (ὄντα) into absolute and relative, a bicategorial scheme which became formal Academic doctrine under his second successor Xenocrates (F15 Isnardi Parente 2 ). Much the same stance as Plato’s own is developed by Polystratus as a rebuttal of the contemporary Academy. He resourcefully points out that the mere existence of an ontological difference between the two categories does not entail that one or other of them will fall short of reality. Anyone who thinks otherwise, he ingeniously adds, could as easily argue that, since such relative predicates as beneficial and harmful manifestly are part of the structure of reality, it must be the non-relative items such as minerals that are unreal!

Point 2 - "Seeing Double" Does Not Constitute Proof of the Falseness of Sensation

A further attempted innovation likely to have been motivated by the challenge of Academic scepticism is attributable to the Rhodian Epicurean Timasagoras. We have already encountered one of his two recorded innovations to the school’s doctrine of vision. The other, noted by Cicero (Lucullus, 80) in his defence of the New Academy’s scepticism, concerns the case of seeing double. To judge from the Ciceronian context, the debate ran more or less as follows.

1. Epicurus insists on the truth of all sense-perceptions. If a single case of a false sense-perception were found, trust in the senses would collapse. But in fact the eye simply registers with unfailing accuracy the visual data reaching it. In all alleged cases of optical illusion the error lies in the mind’s misinterpretation or over-interpretation of those visual data.
2. Critics from the New Academy respond with the counterexample of an eye squeezed out of shape and as a result falsely seeing the single flame in a lamp as two flames. Here what appear to the eye are the visual data, but not in the form in which they first reached it. How can the Epicureans say that the appearance is ‘true’, when it is not even true to those visual data?
3. Timasagoras replies on behalf of the Epicureans that never, when he has squeezed his eye while looking at a lamp, have there appeared to him to be two flames. This supports the Epicurean thesis that falsehood is always located in the added opinion, not in the eyes themselves.

In stage (3), does Timasagoras mean (a) that in the situation described the bare visual appearance has never even momentarily looked to him like two flames? Or (b) that he has never been misled into thinking that there actually were two flames? Cicero seems to understand the latter. But on either understanding Timasagoras’ reply would be meant to disqualify the Academic example from counting as a genuine optical illusion at all, and thereby to block it from being used as the single counterexample that Epicurus in stage (1) conceded would suffice to destroy his most fundamental epistemological doctrine.

Point 3 - The "Fourth" Criterion Of Truth (the "power of intellectual vision" may be important but does it constitute a criteria of truth?)

The first three criteria listed in this passage – sense-perceptions (aistheseis), preconceptions (prolepseis) and feelings (pathe) – are commonplace both in Epicurus’ own writings and in those of subsequent Epicurean generations. Curiously, however, the fourth item listed, phantastikai epibolai tes dianoias, is likewise at least twice appealed to by Epicurus (Hrdt., 38, RS, XXIV) as if it were another of his criteria of truth. We may therefore take the school’s reported innovation to consist in nothing more than making its criterial status explicit. It is unknown why Epicurus did not himself formally do so in the Kanon, his now lost work on the criteria of truth. It was a work of (in at least two senses!) canonical status, upon which the school reverentially bestowed the extravagant-sounding epithet ‘heaven-sent’ (Cic., ND, I, 43, Plutarch., Adv. Col., 1118Α). Hence, it seems, even a small departure from it had to be acknowledged and, no doubt, justified.

Be that as it may, it seems that one credible motive for the elevation of phantastikai epibolai tes dianoias to official criterial status by Epicurus’ followers was that the expression was felt by them to capture, better than any other, the nature of Epicurus’ own greatest cognitive gift to mankind. As Cicero’s Epicurean spokesman Velleius explains, Epicurus’ godlike superiority lay above all in his powers of intellectual vision:

For the same man who taught us everything else taught us also that the world was made by nature without the need for craftsmanship, and that this thing which you call impossible without divine creativity is in fact so easy that nature will make, is making and has made infinitely many worlds. Just because you [the Stoic Balbus] do not see how nature can do this without a mind, unable to develop your plot’s dénouement you copy the tragic poets and resort to a god. You would not be demanding this god’s handiwork if you saw the measureless magnitude of space, endless in all directions, into which the mind, projecting and concentrating itself (in quam se iniciens animus et intendens), travels far and wide, seeing as a result no boundary of its extremities at which it could call a halt. In this measureless stretch of widths, lengths and heights there flies an infinite mass of countless atoms, which despite the presence of void between them stick together and by taking hold of each other form a continuous whole. And from these are made those shapes and formations of things which you think are impossible without bellows and anvil. With this thought you have placed as a yoke upon our necks a permanent overlord, for us to fear day and night […] Freed from these terrors by Epicurus, and delivered into freedom, we do not fear those whom we understand neither to bring trouble upon themselves nor to try and make trouble for others, and with holy reverence we worship their supremely fine nature (ND, I, 53-54, 56).

Velleius thus brings out what Epicureans can achieve for themselves if they follow Epicurus on his odyssey of the mind, and thus come to appreciate the inevitability that mere atomic accident, operating as it must do on an infinite scale, will produce worlds like our own, without the need for divine craftsmanship. That in its turn requires them to see, by mental projection, what the universe’s infinity really means.

Point 4 - Sign-Inferences (Whenever Signs Are Indeed Useful, It Is Because Their Truth Is Established By The Senses)

Arguably the most important contribution to the history of philosophy to emerge from the wreckage of Philodemus’ library is to be found in his own treatise On sign-inferences. 15 Seemingly intended for school use rather than for publication, it is his record of an otherwise quite unknown debate about scientific method that is likely to have taken place around the beginning of the 1 st century BC, in Athens. In it Philodemus summarizes (down to XXVII, 28), both from his own lecture notes and from those of his fellow-student Bromius, how their teacher Zeno of Sidon, and likewise the eminent contemporary Epicurean Demetrius of Laconia (XXVIII, 13- XXIX, 16), had defended their own shared theory of scientific inference against opponents who denied its validity. This favoured Epicurean method is the ‘similarity method’ (ὁ καθ᾽ ὁμοιότητα τρόπος), while the opponents advocate instead the deductive ‘elimination method’ (ὁ κατ᾽ ἀνασκευὴν τρόπος, or just ἀνασκευή, ‘elimination’, for short). These opponents are almost certainly Stoics. If in the early years of the first century BCE it is the epistemological challenge posed by another doctrinal school, rather than the rapidly weakening scepticism of the New Academy, 16 that now occupies the Epicureans’ main attention, that is very much a sign of the times.

The similarity method is itself subdivided into two species. The first is based on direct similarity, as is well exemplified (though not exhausted) by inductive inference, the standard example being inference from the exceptionless mortality of human beings in our experience to the universal mortality of all human beings, including those outside our experience. The second species is based on analogical rather than direct similarity, the analogy normally taking the form of an inference from the macroscopic to the microscopic. For instance, since macroscopic motion depends on empty space, motion at the microscopic level of atoms also does so. Both species of the method constitute Epicurean procedures for the use of ‘signs’ – that is, for the scientific discovery of unobserved truths by inference from the directly observable evidence.

It should be clear that the analogical use of the method formally encodes what had always been, at least in outline, a primary Epicurean procedure for investigating the unobservable realm of atoms and void. The stock example noted above, the inference from motion to void, corresponds to the very first inference of the physics we meet in Epicurus’ epitome the Letter to Herodotus (40). It is less immediately obvious why the inductive use of the method should be equally important to Epicureans, but the following is a likely motive. In Cicero’s De natura deorum the account of Epicurean theology, probably itself derived from a work by Zeno of Sidon, includes a consensus omnium argument for the existence of gods (I, 43), starting from the premise that all human races have the prolepsis of gods. Whether this argument was already used by Epicurus himself can be disputed, but its use in the school by the time Philodemus studied there should not be in doubt. To defend the soundness of its main premise, that all human races have a prolepsis of gods, would have required arguing, by appeal to the similarity method, from the attested religious conceptions of known races to the unattested religious conceptions attributable to unknown races. This may well be among the contexts in which the inductive version of the ‘similarity method’ was first fully formulated and defended.

It seems likely, in addition, that its formulation and defence were a response to the Stoic critics. This is because the critics, as reported by Philodemus, deny the formal validity of such ‘similarity’ inferences – thus incidentally anticipating the Humean problem of induction – and insist instead that the only valid inferences from observed sign to unobserved significate are those that respect the ‘elimination’ criterion: that if the significate is ‘eliminated’, i.e. taken to be false (in the case of a proposition) or non-existent (in the case of a state of affairs), then the sign is, simply thereby, ‘co-eliminated’. And this seems to be an adaptation to sign-inferences of the favoured Stoic criterion of conditional entailment known as synartesis: that the negation of the consequent in a conditional should ‘conflict’ with the antecedent. In the terminology of this debate, signs differ from conditionals only to the extent that their standard formulation, instead of the conditional

‘If p, q’, is ‘Since p, q’, the latter being what Stoics would call a ‘paraconditional’ (παρασυνημμένον), equivalent to ‘If p, q; and p’.

Remarkably, the Epicurean side in the debate seems fully prepared to accept this fundamentally a priori ‘elimination’ criterion as correct, and to retain it alongside the ‘similarity’ criterion rejected by the Stoics. The Epicurean strategy is not to reject the Stoic inferential criterion but to minimize its role in sign-inference. The Stoic quest for a purely deductive scientific method is doomed to failure, they allege, since even the a priori elimination method cannot avoid relying on premises established by the empirical similarity method.

True, the Epicureans say, the sign-inference “Since there is motion there is void” goes through trivially by the elimination method, because according to them if void is eliminated, motion is thereby co-eliminated. But that natural and universal generalization about motion is one that we have learnt in the first place by empirical generalization over a vast range of experiences, where without exception motion is observed to take place only where there is room for it to do so.

This Epicurean strategy exhibits the empiricism that had always been the school’s epistemological hallmark, and which is here taken to underwrite all necessary truths: even apparently a priori truths are in reality generalizations from experience. Thus the same inductive methodology is pushed even into the realm of mathematics: from the fact that every 4x4 square in our world has an area numerically equal to its perimeter, we may correctly infer that the same is true of 4x4 squares in all other worlds too (Philodemus, On sign-inferences, XV, 28-XVI, 1).

If induction sounds like a bizarre way to establish the facts of mathematics, it should seem less so when we note that its key criterion is that of inconceivability. The basic format of a similarity inference is “Since x is F, y is F”, the justification being that y is so similar to x in nature as to make it inconceivable that y should lack an essential predicate of x. Thus it is ‘inconceivable’ (XV, 37-38) that, while all 4x4 squares in our world have a certain property, 4x4 squares in other worlds should lack that property. To generalize, if two or more things are sufficiently similar in their nature, it is inconceivable that they should differ in some essential property. And this applies without distinction to mathematical and to (for instance) biological generalizations:

[...] for instance, “If Plato is a man, Socrates is a man too.” For given that this is true, “If Socrates is not a man, Plato is not a man either” comes out true as well, not because by the elimination of Socrates Plato is co-eliminated, but because it is impossible to conceive of Socrates not being a man but Plato being a man. And that belongs to the similarity method (On sign-inferences, XII, 19-31).

The ultimate justification for this approach seems to lie in an Epicurean brand of essentialism, expressed by what we may call the ‘qua operator’, which is captured in Philodemus’ Greek by a range of subtly different terms translatable as ‘in so far as’, ‘in that’, etc.:

Those who attack sign-inference by similarity do not notice the difference between the aforementioned [senses of ‘in so far as’ etc.], and how we establish the ‘in so far as’ premise, such as, for instance, that man in so far as he is man is mortal. [...] For we establish the necessary connection of one thing with another thing from the very fact that it has been an observed concomitant of all the instances which we have encountered, especially as we have met a variety of animals belonging to the same type which while differing from each other in all other respects all share such-and- such common characteristics. Thus we say that man, in so far as and in that he is man, is mortal, because we have encountered a wide variety of men without ever finding any variation in this respect, or anything that draws us towards the opposite view. So this is the method on which the establishment of the premise rests, both for this issue and for the others in which we apply the ‘in so far as’ and ‘in that’ construction – the peculiar connection being indicated by the fact that the one thing is the inseparable and necessary concomitant of the other.

The same is not true in the case of what is established merely by the elimination of a sign. But even in these cases, it is the fact that all the instances which we have encountered have this as their concomitant that does the job of confirmation. For it is from the fact that all familiar moving objects, while having other differences, have it in common that their motion is through empty spaces, that we conclude the same to be without exception true also at the microscopic level. And our reason for contending that if there is not, or has not been, fire, smoke should be eliminated, is that smoke has been seen in all cases without exception to be a secretion from fire (On sign-inferences, XXXIV, 29-XXXVI, 7).

In case it should be suspected that Epicurus’ own favoured inferential principle, appeal to the ‘lack of counterevidence’ (οὐκ ἀντιμαρτύρησις), has simply been replaced by this newly evolved methodology, we should note that it retains a significant role, not only in the above passage, but also in its immediate sequel:

Another error which they make is in not noticing our procedure of establishing that no obstacle arises through things evident. For the existence of chance and of that atoms: it is necessary to show in addition that nothing else self-evident conflicts with the thesis 17 (On sign-inferences, XXXVI, 7-17).

Here, two centuries after his formulation of it, Epicurus’ own scientific methodology is visibly being honoured and maintained by his successors in the school he founded. True, the pressure to compete in current far more sophisticated debates about the justification of scientific inference has unmistakeably relegated that original methodology to a subordinate role. But it is important to recognize that the ultimate aim of the updated competitive strategy is nevertheless that of committed loyalists. It is the goal of vindicating – and by no means of modifying – Epicurus’ proprietary doctrinal positions. The most striking case of this, well attested in On sign- inferences and elsewhere, is Epicurus’ much-derided thesis that the sun, far from being larger than the earth as the astronomers maintain, is actually just as small as it appears. 18 As we learn from Philodemus (On sign- inferences, IX, 18-XI, 9), Zeno of Sidon faithfully defended this thesis against Stoic attacks. 19 And in doing so he brought to bear the full Epicurean armory developed in the debate we have been witnessing.

In this episode we will start by revisiting the remarks made last week as to "all sensations are true," and we will add in an article that Godfrey just pointed us to:

Thread

David Sedley's "Epicurean Theories of Knowledge From Hermarchus To Lucretius And Philodemus"

Thanks to Godfrey for this link:

https://www.academia.edu/43841650/Epicu…card=view-paper



I note that it contains reference to something we've mentioned briefly lately, Epicurean criticism of Democritus and others who tended toward skepticism:

Cassius

August 22, 2024 at 4:48 PM

If we have time after that, we'll proceed into Section 26 and apply what we've been discussing.

Welcome to Episode 243 of Lucretius Today. This is a podcast dedicated to the poet Lucretius, who wrote "On The Nature of Things," the most complete presentation of Epicurean philosophy left to us from the ancient world.

Each week we walk you through the Epicurean texts, and we discuss how Epicurean philosophy can apply to you today. If you find the Epicurean worldview attractive, we invite you to join us in the study of Epicurus at EpicureanFriends.com, where we have a thread to discuss this and all of our podcast episodes.

Today we are continuing to review Cicero's "On the Nature of The Gods," which began with the Epicurean spokesman Velleius defending the Epicurean point of view. This week will continue into Section 26 as Cotta, the Academic Skeptic, responds to Velleius, and we - in turn - will respond to Cotta in particular and the Skeptical argument in general.

For the main text we are using primarily the Yonge translation, available here at Archive.org. The text which we include in these posts is available here. We will also refer to the public domain version of the Loeb series, which contains both Latin and English, as translated by H. Rackham.

Additional versions can be found here:

• Frances Brooks 1896 translation at Online Library of Liberty
• Lacus Curtius Edition (Rackham)
• PDF Of Loeb Edition at Archive.org by Rackham
• Gutenberg.org version by CD Yonge 

A list of arguments presented will eventually be put together here.

Today's Text

XXVI. It seems an unaccountable thing how one soothsayer can refrain from laughing when he sees another. It is yet a greater wonder that you can refrain from laughing among yourselves. It is no body, but something like body! I could understand this if it were applied to statues made of wax or clay; but in regard to the Deity, I am not able to discover what is meant by a quasi-body or quasi-blood. Nor indeed are you, Velleius, though you will not confess so much. For those precepts are delivered to you as dictates which Epicurus carelessly blundered out; for he boasted, as we see in his writings, that he had no instructor, which I could easily believe without his public declaration of it, for the same reason that I could believe the master of a very bad edifice if he were to boast that he had no architect but himself: for there is nothing of the Academy, nothing of the Lyceum, in his doctrine; nothing but puerilities. He might have been a pupil of Xenocrates. O ye immortal Gods, what a teacher was he! And there are those who believe that he actually was his pupil; but he says otherwise, and I shall give more credit to his word than to another’s. He confesses that he was a pupil of a certain disciple of Plato, one Pamphilus, at Samos; for he lived there when he was young, with his father and his brothers. His father, Neocles, was a farmer in those parts; but as the farm, I suppose, was not sufficient to maintain him, he turned school-master; yet Epicurus treats this Platonic philosopher with wonderful contempt, so fearful was he that it should be thought he had ever had any instruction. But it is well known he had been a pupil of Nausiphanes, the follower of Democritus; and since he could not deny it, he loaded him with insults in abundance. If he never heard a lecture on these Democritean principles, what lectures did he ever hear? What is there in Epicurus’s physics that is not taken from Democritus? For though he altered some things, as what I mentioned before of the oblique motions of the atoms, yet most of his doctrines are the same; his atoms—his vacuum—his images—infinity of space—innumerable worlds, their rise and decay—and almost every part of natural learning that he treats of.

Now, do you understand what is meant by quasi-body and quasi-blood? For I not only acknowledge that you are a better judge of it than I am, but I can bear it without envy. If any sentiments, indeed, are communicated without obscurity, what is there that Velleius can understand and Cotta not? I know what body is, and what blood is; but I cannot possibly find out the meaning of quasi-body and quasi-blood. Not that you intentionally conceal your principles from me, as Pythagoras did his from those who were not his disciples; or that you are intentionally obscure, like Heraclitus. But the truth is (which I may venture to say in this company), you do not understand them yourself.

Joshua given the material we covered in the last podcast, we may want to take a look at the material in this article and cover it next week, especially since this is a pretty recent article (2018 if i read correctly) and this helps us link together some of the more recently-discovered material with the older material.

Thanks to Godfrey for this link:

Epicurean theories of knowledge from Hermarchus to Lucretius and Philodemus

Epicurean theories of knowledge from Hermarchus to Lucretius and Philodemus

www.academia.edu

I note that it contains reference to something we've mentioned briefly lately, Epicurean criticism of Democritus and others who tended toward skepticism:

AI transcript of Episode 242 (subject on the downside to gross error, and on the upside to using better grammar than we sometimes spoke!) here:

Episode 242 - EpicureanFriends Handbook

1. I like that chart very much! But given the "difficulty" of the issue (that so many of us are ingrained by orthodoxy to think of perceptions or sensations as being true or false) I wonder if the "it" in that chart needs to be replaced by "opinion" for clarity's sake. Either a header that states clearly that what is being discussed is opinion, and not perception or sensation, or in each case substitute "opinion" for "it", or maybe even both might be necessary to drive the point home hard enough

2.

Quote from Bryan

Opinions about perceptions can be false, but the perceptions themselves are not false - they must be real because they physically affect us. However, we must think about and judge these "honest" reports of our sensations to figure out the extent that they do, in fact, accurately correspond to external objects and circumstances.

That brings up another point I may have stumbled over in the podcast. I too am tempted to emphasize that it is important to separate "external objects and circumstances" from "those that are not external." And I do think that's a significant point for many decisions in life, especially as to "what to do" about the thing that is moving or physically affecting us.

But for purposes of the current discussion, I think Epicurus is telling us to consider as "true and real" anything that moves us - external OR internal . It would be easy to argue that Epicurus would choose to do that as part of emphasizing a standard of reality very different from what Democritus was focusing on when Democritus said something to the effect that only atoms and void "really exist." Seems to me that Epicurus is telling us to regard as "real" anything whatever, inside us or outside us, that can "touch" or "move" us.

The theory of "images" pretty cleanly describes a way that we can be "moved" by the mind being impacted by images of things that have real existence (horses and men) or even by things that don't have real existence, but which come to us through images (centaurs). But I am less clear on what Epicurus would say about "ideas" like "capitalism" or "communism" or whatever. Would it be proper to conclude that a vision of a centaur is "real" because it comes to us in the form of an image, but "capitalism" is not real because it is purely an idea. I can see people saying that "ideas" can "move" us, but unless the particular idea is embodied in some kind of "image," I am not sure Epicurus would consider that it has the same reality as the image of a Centaur.

I think it's very likely to be shocking (and therefore good to talk about) that Epicurus would say that "centaurs" or "the dreams of madmen are real" but that "capitalism is not real."

Agree or disagree on any of this?

If anyone happened to listen to this episode for the first hour or so that it was up, I apologize because I had to do some supplemental editing. I think the problem is now largely corrected.

The issue came about because of the continuing trouble i have fixing a meaning on the underlined part of the following quote from DIogenes Laertius:

Quote

[32] Nor is there anything which can refute the sensations. For a similar sensation cannot refute a similar because it is equivalent in validity, nor a dissimilar a dissimilar, for the objects of which they are the criteria are not the same; nor again can reason, for all reason is dependent upon sensations; nor can one sensation refute another, for we attend to them all alike. Again, the fact of apperception confirms the truth of the sensations. And seeing and hearing are as much facts as feeling pain.

I have a tendency to say (and I am afraid I may have written in the past) that the repetition of receiving the same perception in the same way over time 'confirms' prior perceptions. More reflection causes me to think that's exactly the wrong way to say it. As I see it today, it is repeated observations that confirm "opinions," which we make from the perceptions, but the perceptions themselves are not "confirming" each other. As Lucretius says in Book 4 in the part underlined below:

Quote

[478] You will find that the concept of the true is begotten first from the senses, and that the senses cannot be gainsaid. For something must be found with a greater surety, which can of its own authority refute the false by the true. Next then, what must be held to be of greater surety than sense? Will reason, sprung from false sensation, avail to speak against the senses, when it is wholly sprung from the senses? For unless they are true, all reason too becomes false. Or will the ears be able to pass judgement on the eyes, or touch on the ears? or again will the taste in the mouth refute this touch; will the nostrils disprove it, or the eyes show it false? It is not so, I trow. For each sense has its faculty set apart, each its own power, and so it must needs be that we perceive in one way what is soft or cold or hot, and in another the diverse colours of things, and see all that goes along with colour. Likewise, the taste of the mouth has its power apart; in one way smells arise, in another sounds. And so it must needs be that one sense cannot prove another false. Nor again will they be able to pass judgement on themselves, since equal trust must at all times be placed in them. Therefore, whatever they have perceived on each occasion, is true.

So I have cleaned up what I said about this in the opening of the episode. I need to listen further to see if i repeated the error later, and if so I'll cut that out too. Probably also this will be worth coming back to emphasize next week. i think the correct formulation is that

repeated perceptions over time confirm OPINIONS, or prove them to be incorrect if they are not true, but perceptions over time never confirm or deny prior perceptions.

Perceptions are NOT equal to opinions, and perceptions are never true or false!

Correct?

One thing I'd like to memorialize from our discussion last night was that thanks to Raphael Raul we got into a discussion once again as to the relationship of "pleasure" as compared to "tranquility" and the uses of those terms.

Bryan brought up something in particular that is worth remembering and would be good to note here while it is fresh.

Bryan could you state again your comparison of the number of times the words "Pleasure" and "Tranquility" appear in the works of Epicurus? I've already forgotten whether your universe of selection was "how many times those words occur in Usener's Epicurea" or "how many times those words appear in Diogenes Laertius Book Ten" or what.

But either way it would be good to mark that down for future reference.