"Cogito, Ergo Sum" is a Latin phrase that translates to "I think, therefore I am." It was coined by the philosopher René Descartes in the 17th century as a fundamental element of his philosophy. Descartes used this statement to establish a foundation for knowledge, asserting that the very act of thinking is proof of one's existence. This idea emphasizes the importance of doubt and questioning in the pursuit of truth. By doubting everything, Descartes concluded that the one thing he could not doubt was his own existence as a thinking being. This concept has influenced modern philosophy and discussions about consciousness and self-awareness.