Some poor kid is going to read that and, based on the authoritative tone, believe it to be accurate information. The nature of people is to not look for more information on something they have slight interest in when they think they already know the answer.

I mean, gods, he managed to actually get every single point wrong while sounding like he knew exactly what he was talking about.
People
must learn that it is good to be able to answer "I don't know" to a question and then learn. This crap about being embarrassed not to know or having to posture and pretend to know things you don't is very bad. "I don't know" is a very honorable answer to a question.