Bill Zebub
“It’s probably Matt Mercer’s fault.”
I disagree its trivial. Unless you distrust the GM involved, I don't find it any more trivial than "You can't tell there's a trap" and "You don't think there's a trap."
I don't think you understand what I'm saying.
I agree that if the DM is carefully choosing their words, and what they mean by it is that the player's character believes the NPC and should behave accordingly, then it's an important distinction.
But the DM might also just be slopping about choosing their words, which I suspect is what happens. (Either that or the DMs I've encountered seethe on the inside about the terrible roleplayers the universe has saddled them with...)