He understood and said this was a problem for creationism and he asked for a book recommendation. I suggested Why Evolution Is True by Jerry Coyne and he said he would read it but he was not throwing out his magic god fairy. I said it doesn't matter. At least you're trying to understand evolution and that's wonderful. I congratulated him.
Every other attempt to explain science to these brain-dead science deniers failed. They don't understand because they don't want to understand.