1.  How does Descartes go about attempting to prove that material objects must exist?  What are the principles used to prove it?

2.  How does Descartes attempt to show that minds and bodies are separate and distinct substances?  What is the quality of this argument?

3.  What is Berkeley's argument that believing that matter exists involves the believer in a logical contradiction?

4.  What is Berkeley's argument to show that primary and secondary qualities are not distinct?

5.  How does Berkeley show that the representative theory of perception is incoherent?  What is the representative theory of perception?  How is it assumed to "work"?