“There’s no solid evidence that IQ (in a healthy person who has no disability) is inherent.”
Odd. I’ve met a lot of stupid people. And while I’m very smart in math and reading, I cannot learn a foreign language to save my soul.
What makes you think that everyone has the same intelligence? Haven’t you ever met a student who worked hard, studied, and didn’t learn? That, BTW, described me taking French and German, although I had no problem with Calculus in High School and got a BS in Biology in 3 years.
I never said everyone has the same amount of intelligence. If you reread the line I wrote, you'll see that I said there's no solid evidence that IQ (i.e. "intelligence") is inherent, unless a person has a real disability. At this point, scientists say they still don't know enough about the brain.