Yes, Bob, Bayes does trump Popper. Eliezer has explained that pretty well already. However, I don't see how that saves ethics. There is no disconfirming evidence, and as a result no confirming evidence. There is no utility in knowing ethics, as far as I know, as it will not enable me to make better predictions or do neat things like sending a rocket to the moon. So I ask you, what makes ethics different from theology or astrology so that I should care what experts in it say?