For example I recently realised that in a room of competitive debaters (college educated well read people) no-one knew what I meant by epistemic uncertainty.
Wait, what do you mean by "epistemic uncertainty"? The top Google results for the phrase contrast it with "aleatoric uncertainty" which is so esoteric that it's not even in LW's vocabulary (zero results for "aleatoric" on LW search).
"Epistemic uncertainty" sounds like a fancy way of saying "ignorance". "Aleatoric" I think means "stochastic" (the cognate of that word in Italian is not terribly uncommon).
I'm sure most of us are used to just being able to badger him about things in the comments here on LW, but for anyone interested here's the link.