[Jensson]

> I have a theory that a lot of mental biases could be explained by energy minimization - changing beliefs requires brain reconfiguration which is expensive, so we tend not to do it... unless it's imperative to survival.

I am pretty sure this is a very variable trait among humans, some change their mind easily others almost never change their mind. Its expensive as you say, probably communities survive best when some change their mind easily and most keep their mind steady and only change when presented overwhelming evidence (usually from the minority that easily change).