"It is better to have many wrong theories than a few wrong beliefs."
Undoubtedly, because people test their theories, but do not test their beliefs.
So a wrong belief never gets challenged, except by other people.
And when that happens, rather than test your belief, it's more likely you categorize the challenger as an enemy rather than test your wrong belief.
Theories rock. :)
Yep, the double-down effect. Rather than consideration, it is a higher barrier.