Berkeley's Empiricism & Subjective Idealism.
Problem 1: What is your reaction to Berkeley's claim that the only things that exist in the universe are minds and ideas that exist in the minds? If you are not comfortable with his eliminating an independently existing external world, how would you go about refuting his ideas?
Hume's Empiricism & Skepticism.
Problem 2: Hume believes that all metaphysical beliefs (that is any belief not based on direct sense experiences) should be "committed to the flames" because it cannot be empirically justified. This would include all beliefs regarding God, human freedom, universal moral laws, and so on. Do you agree with Hume? If not, explain how you would go rebutting his arguments.