Two of the best things I learned in French class (which was basically “Parisian culture of 1982” class) was that “impossible” in French meant “I don’t feel like it”, and if someone shrugged in a way where the edges of their mouth touched the top of their shoulders, you were shit out of luck with whatever you were asking for.
Off-topic but that reminds me of the quote from "Stand on Zanzibar" where 'impossible' is defined as IIRC "1) I can't be bothered or 2) I don't approve or 3) God can't be bothered"