On Bull****

This sounds like a must-get sorta book: On Bullshit, by Harry Frankfurt, a moral philosopher at Princeton. Here's the Times' story on the book, which includes this expurgated excerpt:

One of the most salient features of our culture is that there is so much [bull]. Everyone knows this. Each of us contributes his share. But we tend to take the situation for granted. Most people are rather confident of their ability to recognize [bull] and to avoid being taken in by it. So the phenomenon has not aroused much deliberate concern, nor attracted much sustained inquiry.

Chapter 1 is available on the Princeton University Press website. Don't worry - it's not long.