We all know confidently incorrect people. People displaying dunning-kruger. The majority of those people have low education and without someone giving them objectively true feedback on their opinions through their developmental years, they start to believe everything they think is true even without evidence.
Memorizing facts, dates, and formulas aren’t what necessarily makes someone intelligent. It’s the ability to second guess yourself and have an appropriate amount of confidence relative to your knowledge that is a sign of intelligence.
I could be wrong though.
And it’s difficult if not impossible to be more intelligent with a closed mind no?
(not the op) but yeah, I agree with that.
That said, with the example of your mom, it sounds like it could be insecurity as much as it could be a closed mind. Some people really struggle with the idea that others might think they’re dumb, especially their children. So they assert things as fact, because they want to maintain the image that they have all the answers. Especially when kids are bright, some parents will fight tooth and nail to maintain an air of intellectual superiority, to assert intellectual dominance.
It may seem sad, but it’s pretty understandable, relatable even. - Humans be like that.