(2) Briefly state and explain how Marr's tri-level hypothesis is supposed to integrate the space of cognitive science. Then, briefly state and explain the main objection to this proposal we covered. In light of the objection, do you think the proposal is a promising one? (3) What is the hard problem of consciousness and why does Chalmers thinks it is particularly difficult to solve? In your opinion, should cognitive scientists be trying to solve the problem? Why or why not