Canonics - The Tests of Truth

Canonics - General Discussion

Epicurus held that his "Canon of Truth" is the key to confident level, and the antidote to both unfounded dogmatism and radical skepticism.
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Discussion of Article - "Sextus Empiricus - Introduction From An Epicurean Perspective"
Pacatus October 26, 2026 at 6:06 PM
The Nature of Truth in Epicurus: ἀλήθεια
Cassius September 25, 2026 at 2:46 PM

He Who Says Nothing Can Be Known Knows Nothing - Rejection of Skepticism

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11
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David Sedley's "Epicurean Theories of Knowledge From Hermarchus To Lucretius And Philodemus"
Cassius April 7, 2026 at 9:27 AM
Cicero's Summary of the Four Main Arguments Against the Possibility of Knowledge
Cassius July 4, 2025 at 5:58 PM

Responding to "Logic Based" Anti-Epicurean Arguments

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9
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Epicurus' Response to "Infinite Regress" Arguments
Patrikios April 16, 2026 at 3:50 PM
Responding to the Avicenna "Proof of the Truthful" Argument For A Supernatural God
Cassius April 11, 2026 at 1:21 PM

All Sensations Are True - The Nature of Truth

Was Epicurus An Empiricist?
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8
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16
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The Four Steps In The Academic Skeptic Denial Of Knowledge - And Epicurus' Response
Cassius September 26, 2026 at 6:28 AM
Nietzsche Agreeing With Epicurus That The Senses Do Not Lie
Cassius April 21, 2026 at 4:17 PM

The Five Senses

Sight, Sound, Touch, Taste, Smell
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6
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There is One Reality but it is "Perspective Dependent"
Pacatus June 25, 2026 at 2:43 PM
Memorable Line from Lucretius Book IV: "The Eyes Can Know Nothing of the Nature of Things"
Cassius January 2, 2021 at 9:17 AM

Rejection of Dialectical Logic and Skepticism

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2
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Epicurus' Rejection of Dialectic (Cicero's De Oratore)
Cassius August 15, 2024 at 12:49 PM
The dangers of dialectical logic
DavidN January 26, 2024 at 10:34 PM

The Priority of Nature Over Reason

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11
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154
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Keen Reasoning Based on the Evidence of the Senses
Cassius November 29, 2022 at 11:13 AM
General Principles For Evaluating Credibility Of Claims And Detecting Deceit
Charles November 29, 2022 at 10:47 AM

The Embrace of Practical Reason

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4
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19
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Who are capable of figuring the problem out
Patrikios June 6, 2025 at 6:54 PM
Mulitvalent or Manifold Reasoning / Fuzzy Logic
Kalosyni October 24, 2024 at 11:21 AM

Rejection Of Atomic Reductionism

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3
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25
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Article - David Sedley - 1988 - "Epicurean Anti-Reductionism"
Cassius June 21, 2026 at 4:44 PM
Epicurus' Rejection of "Reductionist Atomism" (And The Related Issues of Skepticism and Determinism)
Cassius February 24, 2024 at 2:12 PM

Anticipations / Preconceptions / Prolepsis

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30
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How a Defense of Christianity Revolutionized Brain Science article
Patrikios October 21, 2026 at 6:16 PM
Optical Phenomena (Not Necessarily Just Optical "Illusions") And Their Relationship To Prolepsis / Anticipations
Cassius October 12, 2026 at 2:44 PM

The Feelings / Passions / Internal Sensations: Pleasure and Pain

Feeling: The Faculty of Pleasure and Pain
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18
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The relationship between pleasure and pain and emotions and feelings
Matteng September 17, 2025 at 3:27 PM
Discussion of Article: "On Pleasure, Pain and Happiness"
Cassius February 12, 2024 at 4:45 PM

Rejection Of Platonic Ideal Forms, Aristotelian Essences, and Divine Revelation

This forum will collect discussions of Epicurus' rejection of the use of various arguments associated mainly with Pythagorus and Plato (geometry and mathematical and "ideal forms") or Aristotle (essences) as the basis of an ordered universe created by a supernatural force.
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5
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Would Epicurus approve of Biblical or Quranic studies in order to confident in disproving it?
Bryan January 24, 2026 at 11:59 AM
Article: "Epicurean Induction and Atomism In Mathematics" - Michael Aristidou (2023)
Cassius August 15, 2025 at 7:19 AM

Explaining Why Illusions Do Not Invalidate Reliance on The Senses

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Purpose of this Subforum - Explaining How Illusions Are Corrected By The Senses Themselves
Bryan May 6, 2024 at 3:19 PM

Explaining Epicurus' Position On The "Size of the Sun" And Related Issues of Speculative Math / Geometry

Explaining Epicurus' Position On The "Size of the Sun" And Related Issues of Speculative Math / Geometry
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3
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"Lucretius on the Size of the Sun", by T.H.M. Gellar-Goad
Cassius July 19, 2025 at 5:21 PM
Why Is Physics Important? To Refute Arguments such as these:
Cassius July 31, 2019 at 9:09 PM

"Images" And Their Significance

"Images" And Their Significance
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4
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Was The Epicurean Theory of Images Meant By Epicurus To Take The Place of Conventional Views of "Memory" As A Storage Mechanism?
Cassius April 21, 2021 at 2:19 PM
Cross-Reference: Discussion of Images Impacting the Mind in Lucretius Today Podcast 60
Cassius March 1, 2021 at 8:59 AM

Modern Research Into Issues Relevant to Canonics

Issues relating to modern research will appear throughout the other forums, but this subforum is specifically devoted to modern researchers whose work is relevant to modern scientific perspectives on issues related to "canonics," including brain functions, rather than primarily philosophical in nature.
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5
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94
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What does modern neuroscience say about the perception of reality vs Epicurus?
DaveT January 27, 2026 at 11:50 AM
Embodied Cognitive Science
Pacatus July 27, 2023 at 12:31 PM

Opposition To Epicurean Canonics

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1
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Plotinus and Epicurean Epistemology by Lloyd P. Gerson
Eoghan Gardiner June 11, 2023 at 1:10 PM