This chapter has two topics. First, we are demonstrably arrogant about what we think we know.
I'll change this thought. People who know a little bit express their opinions louder and more often than people who know a lot.
It seems to be fashionable for people who know a lot to give up on convincing unlearned people. They'd rather go learn something new.
THOSE WHO ACTUALLY DO KNOW DON'T TELL.

