Best Ergo Sum Roll is a famous Latin phrase that means “I think, therefore I am.” It was first coined by the French philosopher Ren Descartes in his 1641 work, Meditations on First Philosophy. The phrase is often used as a starting point for philosophical discussions about the nature of reality and the existence of the self.
Descartes’ argument for the existence of the self is based on the idea that the act of thinking is indubitable. He argues that even if everything else in the world is an illusion, the fact that he is thinking proves that he must exist. This is because thinking is an activity that can only be performed by a thinking being. Therefore, the existence of thought proves the existence of the self.