That last post as to competing definitions crystallizes why I see no benefit, and much harm, in talking too much about "psychological hedonism" or "ethical hedonism" or even "hedonism."
I agree, but this doesn't address the question that has arisen from this thread:
Does "Pleasure is the End (insert whatever word you want here: telos, summum bonum, goal, The Good/ταγαθον/tagathon, etc) mean Epicurus stated a law of nature and The Way Things Are - or - does Epicurus mean we should use Pleasure as a guide toward which to aim?
Those seem to be two very different questions.
My perspective is he meant the former: the telos of pleasure is a law of nature. We can then choose to work with the laws of nature or against them. It's a Wile E. Coyote trying to run off the cliff. He's eventually going to fall because that's the way things work.
So, as far as I'm concerned, I feel no need to add to the new thread about hedonism, but I think the larger issue is still very much in play.