A- Not so. If the human does not consciously nor subconsciously care about deterrent, evolutionary reasons are irrelevant.
B- Only if, and this is a big if, you agree with the Elizier-Harris school of thought which say some things are morally true by definition. Because Harris agrees with him, I was granting him that as his own unique idea of what being moral is. However, at that point I was concerned with demonstrating morality cannot fit as a subcategory of science.
C- Harris appears to claim that there is a scientific basis for valuing wellbeing- he repudiates the hypothesis that there is none explicitly by claiming it comparable to the claim there is no scientific basis for valuing health.
This discussion isn't getting anywhere, so, all the best :)
Sam Harris is here offering a substantial amount of money to anyone who can show a flaw in the philosophy of 'The Moral Landscape' in 1000 word or less, or at least the best attempt.
http://www.samharris.org/blog/item/the-moral-landscape-challenge1
Up to $20,000 is on offer, although that's only if you change his mind. Whilst we know that this is very difficult, note how few people offer large sums of money for the privelage of being disproven.
In case anyone does win, I will remind you that this site is created and maintained by people who work at MIRI and CFAR, which rely on outside donations, and with whom I am not affiliated.
Note: Is this misplaced in Discussion? I imagine that it could be easily overlooked in an open thread by the sorts of people who would be able to use this information well?