> Atheism doesn't presuppose either hedonism or nihilism.

And if the GP thought it did, he would not have bothered to qualify it with those labels.

Since they _did_ specify "atheistic hedonism/nihilism," we know they're talking about those specific stripes of atheism, and can discuss that.

It looks like you were downvoted but for what it's worth you parsed and explained my intention accurately, and I appreciate that.