Philosophy of Science and Moral philosophy from an evolutionary perspective. How evolution created our notions of morality and truth. The naturalistic, relativistic and moralistic fallacies. (The impossibility of concluding what "ought to be" from what is "natural" or "human nature", or "relative to a given culture. " the impossibility of concluding what "is" from what "ought to be. Why some of our moral instincts (which result from natural selection) should be mistrusted. How our notion of truth derives from the need to detect lying and deception. The implications of this for how Science Works -- not by "proving" or even "refuting" arguments, but by comparing alternative explanations for phenomena and selecting those that best match the data.