There's a book about videogame semantics called 'Trigger Happy' in which there's a Mario anecdote. Somebody's mum asked why her character couldn't climb the trees that dotted the landscape. Answer: they're not really trees.
I'm playing in a Shadow of Yesterday game. One of the players has only ever played Sorcerer (run by me), so her take on things is fascinating.
Last session, she asked if she could roll Vigor (a pool, not a rollable trait) to see if she was strong enough for something. The rest of the group had explained Vigor as 'strength, kinda'. And with no rollable strength trait in the game, we flailed a bit.
Not only had we explained Vigor badly, but the semantics of the system let her down. Why can't you roll hit points? Or Nature and Demeanor?