What does it mean when someone keeps blinking their eyes after you tell them something?

It’s definitely a nervous tick but specificly what it means in context is hard to say. What was being said was obviously upsetting to him, and I would find it very poor form for a school principal to weigh in on or attempt to diagnose a child psychology issue (especially using such a bigoted and a divisive word such as crazy) that they clearly have no training for. Imagine telling a diabetic that you know they are faking been a weakling about sugar, that they are just trying to be obstinate about the school snack.

It amazes me that people think they can be openly bigoted to people that may be suffering mental illness issue and some how that’s okay.

Not sure you can establish that response as an "Absolute Reason."

Could be a triggered response to stress.

Could be a kinesis disorder.

Could be several different things.

I think that’s how one signals they’re being held hostage

They have something in their eye.

I've always found they are lying to me

He's been replaced by a synthetic, they do that when they are trying to 'compute' what is happening.

It's not what was said it's what was emitted. Use "Beano" next time.

could mean a lot of different things....pollen?

It's morse code for "Help me"

About to cry?

Probably an android

Morse code

it doesnt mean anything

Could be dementia or something like that.

Some people blink a lot when they are trying to think of a lie. Other people blink a lot when their eyes are irritated. Could be something, could be nothing.