Avid Humes An Enquiry Concerning Human Understanding

In his Enquiry Concerning Human Understanding, David Hume undertakes to provide a detailed account of a?the powers and faculties of human naturea (p. 7). In section II, he introduces a distinction between a?ideasa and a?impressionsa. How, according to Hume, do ideas differ from impressions? What reasons does Hume offer in support of his claim that a?all our ideas . . . are copies of our impressionsa (p. 11)? Are these reasons convincing? At the end of section II, Hume identifies a potential counterexample to the claim that the a?creative power of the mind amounts to no more than the faculty of transposing, augmenting, or diminishing the materials afforded us by the sensesa. This example is that of the a?missinga shade of blue. To what extent, if any, does this example undermine Humeas empiricist account of the origin of ideas?