Even worse: if you have an IQ of 100, there are lots of things you just can't do.
And if you have an IQ of 120? Still lots of things you just can't do.
Same with 140. And it doesn't even stop there.
There are two different form of understandability that comes to my mind,
1. Things that you don't understand because you don't have the necessary background knowledge,
2. And the things you'd fundamentally never understand because of the limitations of your own mind, which is, limited by the IQ.
I' assuming you're trying to mean the second version here.
