We can know nothing for certain

Even to agree that "water is wet" or "the sky is blue" requires only that we agree in words, not that I understand what "wet" or "blue" mean to you. Newton's laws and the law of gravity are each just the recognitions of patterns, and Quantum physics says there's no reason they can't be broken
2 supporter.

We can know nothing for certain

Our entire world is a construct of the brain as interpreted through signals received from the sensory organs. There is no such thing as "bright" or "hot" or even "color" except in subjective experience, so why couldn't this be true of everything else too?
4 supporter.