Today's title is very provocative. Explain please.
OK, here is an example. I'm playing in the Physics Department picnic softball game. The batter hits a fly ball. My brain quickly makes a calculation about the path of the ball and my brain moves me toward where my brain predicts it will fall. As my brain sees more of the flight of the ball, it sees that the ball is not following a parabola because of spin, makes a better calculation for the path, and moves me toward the new prediction. After many improved measurements and improved calculations, I catch the ball.
So, your brain is ever reducing error using ever better measurements given by your eyes. We say that ever reducing error by replications using ever better measurements and ever better calculations is the hallmark of trustworthy science.
This is also a simple-minded way of describing the point of Bayesian probability.
On brains and Bayes [link]