'lo folks. So I got into it on Twitter with some nut that said "atheists can't have any morality" because he thinks the only logical source for morality is Yahweh (go figure). I'd been meaning to write on the topic (yes, it's been covered multiple times, I'm aware), so I made this. Now he's claiming it's "the most fallacious thing" he's ever read, that it's full of begging the question, and someh…