Good to know. My mom actually criticizes people for this in particular. She's definitely some kind of alpha NT or related. I get real confused at how she can do that without considering my nonverbals, which should likely point to confusion or frustration. This is why I believe she is SF along with other things irrelevant to the issue. Like, she has issues understanding people, gets incredibly angry when they screw up, and then complains. It is an endless cycle.

The probability of a neuro degenerative disease which is not present at all at birth of actually affecting IQ is 0%. Is alzheimer's present at birth? I don't believe the degeneration occurs until later on in life. Risk factors may be there, but that isn't neurological degeneration.