Cogito, René Descartes

"Cogito, René Descartes's famous phrase 'Cogito, ergo sum' means 'I think, therefore I am.' It reflects his belief that the act of doubting or thinking is proof of one's existence. Descartes argued that while we can doubt many things, the very act of doubt confirms a thinking self. This idea was foundational in philosophy, emphasizing consciousness and self-awareness as the certain starting point for gaining knowledge. Essentially, Descartes identified thinking as the most undeniable evidence of our existence."