A good abstraction is one that captures the essential aspects of a concept while ignoring the irrelevant details.

你不能因为我做我自己而生气，我又没干涉你。

The greatest enemy of truth is not the lie, but the myth.

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.