The thing about people who have a lot of whatever it is that we're measuring with IQ is that they quite often tend to be way _more_ wrong than those who have less of whatever it is that those points stand for.

High IQ is kind of like superglue for opinions

Not only doesn't IQ compensate for ignorance or poor methodology, it acerbates the issue.

Rationalisation is a powerful drug. Most people can convince themselves of almost everything but those with high IQ tend to be _extraordinary_ at it.