知识
Some of the biggest cases of mistaken identity are among intellectuals who have trouble remembering that they are not God.
Ideas are everywhere, but knowledge is rare.
It takes considerable knowledge just to realize the extent of your own ignorance.
If facts, logic, and scientific procedures are all just arbitrarily "socially constructed" notions, then all that is left is consensus--more specifically peer consensus, the kind of consensus that matters to adolescents or to many among the intelligentsia.