Comment by ChildOfChaos

It's always worth going back to evolution and thinking about why we do things.

Reasoning came through evolution when we learned to communicate and needed to give reasons for things, not because we needed to figure out how to do things.

Caveman you, steals Caveman Dave's berries. You need to give Caveman Dave a good reason for why you did this, else you get bonk on head.

This explains a lot. The brain decides what it wants AND only then, does it decide the reasons why it wants it. It's a justification and excuse making machine.

Which is why people will argue and twist any fact or truth to match what they believe, they don't come up with what they believe through logic, they use logic to try and come up with a reason for what they believe.

When you really stop to think about that, it changes everything and explains a lot.

(This is outlined in the book The Enigma of Reason: A New Theory of Human Understanding)