> Because if there is such a thing as good art, it's easy to tell which of two people has better taste. Show them a lot of works by artists they've never seen

> Because if there is such a thing as good art, it's easy to tell which of two people has better taste. Show them a lot of works by artists they've never seen before and ask them to choose the best, and whoever chooses the better art has better taste. This step of the argument assumes the conclusion. If both people answer n true false questions randomly, then with high probability (probability at least 1- 1/sqrt(n) ) one person will have answered more questions correctly. This does not imply that either person is better than random.