Once upon a time, there was a very elegant gentleman with a powdered wig and the air of someone who has a daily appointment with the universe. He decided that humanity urgently needed to understand how to know the world. So, without further ado, he sat down to think... and didn't stop. They called him a philosopher, but he could just as easily have been a watchmaker, because he had German precision when it came to taking concepts apart and putting them back together again.