Question 1: Internalism vs Externalism Does Philippa Foot think that we have a duty to be moral? In what sense do we have such a duty, and in what sense do we not?Question 2: Moral Explanations According to Harman, what role does observation play in mathematics that it does not play in ethics?Question 3: Debunking ArgumentsIn arguing against the tracking account (and in favor of the adaptive link account), Street mentions that the adaptive link account is more parsimonious. Why might this criticism not apply to reductive realists?