The older I get the more I realise that I have taken way to much of my mathematical intuition for granted.

This I'd an example of people not grasping simple probabilities. Forced to play Russian Roulette they prefer the revolver with 5 bullets in its chambers or the one with just a single bullet, because in both cases people die.

Other concepts many people do not grasp are feedback-loops and exponentials. And by not grasp I mean: You explain it to them, the nod along and when faced with the thing in slightly different clothes they will actively deny it'd existence.