I Think, You Think, We all Think
Hundreds of years ago, a French philosopher named Rene Descartes shut himself up in a room to do some thinking. He did a lot of thinking, too. In fact, good old Rene did so much thinking that even today people are still thinking about one of the things he thought. Rene's the fellow who said: "I think, therefore I am." I don't know how Rene got