Even on the Internet, where speech is highly disconnected from the speaker, we still see plenty of groupthink, ad hominems, and pre-judgment taking place. If we

Even on the Internet, where speech is highly disconnected from the speaker, we still see plenty of groupthink, ad hominems, and pre-judgment taking place. If we can't accomplish it here, then it certainly can't take place in the real world on a consistent basis. That said, there's too much benefit to these 'irrational' heuristics to discard them.