For the record, however, there is no doubt that Epicurus divided up pleasures into at least 2 different but related kinds. No matter what, we have to account for:
Unfortunately i cannot agree even with this statement. There is not doubt that Diogenes Laertius makes the assertion that that K/K distinction was significant to Epicurus, but there is strong reason to believe that Diogenes Laertius is wrong. And to "account for" the references that are cited is exactly what Gosling and Taylor and Nikolsky go through in great detail. The issue is not whether DL said what he said, but whether DL was right in saying it, and that's the crux of the problem.
We also know that for example Epicurus divided things into "natural and necessary," and that that distinction was significant to be recorded several places very clearly, including the principal doctrines, the letter to Menoeceus, and the vatican sayings
Whatever Epicurus may have thought about K/K, those thoughts were not significant enough to make it into those key documents. Here again, references to ataraxia and aponia are not admitted to be relevant to any kind of K/K distinction. The K/K distinction simply does not appear when the key aspect of pleasure as the good is discussed in the main places where pleasure is addressed.
And the reason why this is worth getting to the bottom of is what we see happening here - what is hardly more than a footnote in DL assumes significance out of all proportion to anything else, and comes to be seized on so as to take the place of the core original point about pleasure in the first place.
That's a large part of the reason Cicero seized on it -- to use as a battering ram to make the whole discussion of pleasure seem nonsensical.
