He took the time from his house to his friend’s house plus the time from his friend’s house home, divided the sum by two, added the result to the time he left and, ach du lieber, vat a genius!  

Kant realized that our experience is based not only on the world as we perceive it, and on information about the world given us by the church, by science and by the state, but also on our own thoughts--our reason, our imagination and our sense of morality. He said that ideas were as real as facts, and that the individual has a right to an independent understanding of the world. His ideas reset the course of philosophy.

Here's a clock problem you can solve yourself:

The clock on the wall loses 2 minutes an hour. The table clock gains 2 minutes every hour on the wall clock. An alarm clock in the bedroom falls 2 minutes every hour behind the table clock, and the wristwatch gains 2 minutes on the alarm clock every hour. At noon, all clocks were set correctly. To the nearest minute, what time will the wrist watch show when the real time is 7:00pm? (No, the 2-minute differences do not cancel each other out.)

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