Philosophy for beginners

Why does philosophy give some people a headache, others a real buzz, and yet others a feeling that it is subversive and dangerous? Why do a lot of people think philosophy is totally irrelevant? What is philosophy anyway? The ABCs of philosophy --easy to understand but never simplistic. Beginning with basic questions posed by the ancient Greeks - What is knowledge? What is good and evil?"Philosophy For Beginners" traces the answers given by western philosophy over the last 2,500 years.