When we're young, we're incorrectly taught to think in absolutes. We apply certainty to everything. The sky is blue. One plus one equals two.
But when we think about it, there are always exceptions and different ways of looking at the obvious. You can stick two pieces of gum together to make one. Says neuroscientist David Eagleman:
“If you could perceive reality as it really is, you would be shocked by its colorless, odorless, tasteless silence.”
The world means nothing without the inquisition of nature.