The problem of deduction ; #1 Dream of Descartes
<Rene Descartes, a french philosopher.> Waken up, but don’t know whether it’s dream or not. Because it was so realistic. In 「 Inception 」 , a famous movie in Hollywood, Dicaprio spins a top to distinguish dreams from reality. If it stops, then he’s in reality. But if it keeps spinning, then he’s in dream. We experienced similar symptoms. A dream more realistic than reality. We don’t know whether it is dream, until we’re awake. Everyone dreams like this, but someone derived philosophical arguments from it. It was Rene Descartes. Descartes was an ambitious philosopher. He decided to find a truth without religion, tradition, and convention. What could be a definite truth in the world? First of all, let's see the empirical things. 'Crows are black.' But what if I didn’t see the exact color because of my color blindness? And white crows can be found someday, then it turns out to be a false. Secondly, the deductive proposition. for example, ‘2+
