It's always been an insane claim that knowledge can't help you utilize knowledge. It's just an excuse to be racist and classist. Everything around IQ is linear, dumb thinking, suitable for trying to reduce everything to a scalar. IQ is a good tool for figuring out whether your child has a physical issue with their brain development, or maybe a hearing problem.

There's nothing logical about brains; they work on heuristics built on reflexes and associations. Logic is something we learn through physically interacting with the world, and from sitting in class. As you learn it, your thinking about other things gets better. When you read great old Chinese philosophers like Mozi struggling but managing to make good arguments without syllogism, it's a reminder that syllogism is something that is invented. It survives because of its unreasonable effectiveness compared to considering what the ancient heavenly kings had done.

It also helps your soul to remember that a lot of people you're arguing with have no idea what a logical argument looks like. They think that an argument is when you try to shut the other person up. It's not their fault, they just literally don't know. They're not arguing in bad faith, they don't know what good faith looks like because the educational system has failed them.