The idea that Wittgenstein's later philosophy provides a refutation of the problem ofscepticism about other minds is prima facie at odds with the emphasis that his remarks give to the uncertainty of our ordinary psychological language-game. The thought that the uncertainty of our language-game is 'constitutional' (RPP 1 141, RPP 2 657) may sound more like an endorsement ofscepticism about other minds than a refutation of it.