Humans have 23 pairs of chromosomes while chimpanzees have 24. This, to said Creationist, is "proof" that evolution is untrue. I know about the 2nd human chromosome being longer, and analogous to 2 chimpanzee chromosomes. How do I explain the merge to him?
They should subtitle it "Creation Science: research into how we would like the universe to work". It's almost cultish, what with avoiding cognitive dissonance and adepts reinforcing each other and all that.