I think, therefore I am.
This is one of the highlights that I can still remember from my first philosophical class last year. A quote by Descartes; concise and short yet can so beautifully depicts the fundamentals of western philosophy.
According to him, one can never be sure about the existence of anything else apart from one's own thoughts. Whatever that one can see, touch, hear or feel may well be just a dream, or a fantasy perhaps. Have you ever been in a dream and all of a sudden, you realise and notice that there's an anomaly, therefore you can almost be sure that you're indeed in a dream.
But, the existence of an anomaly doesn't always mean that you're not in a reality. If this world is an absolute reality to us, how do we explain the numerous anomalies that deviate from the law of physics?
I think, therefore I do. Can I just think, but not realising my thoughts? An anomaly? Why not.