A man will be imprisoned in a room with a door that’s unlocked and opens inwards; as long as it does not occur to him to pull rather than push. (Ludwig Wittgenstein)
In Wittgenstein’s posthumous Philosophical Investigations he argues that meaning of terms is equal to its use within language: each ‘linguistic universe’ has its own rules. Content cannot be separated from criteria by which they are judged: criteria is never inter-cultural, but sub-cultural. Each discipline or ‘language’ game has its own standards, which cannot be reducible to other standards or principles. The task of the philosopher is then to describe and clarify standards, not to judge, defend, or criticize proposals laid out within a ‘language game.’ Criticism can only point out the misuse of language, or violations of the rules.
Argument or judgment does not cross disciplines, for they exist only in reference to criteria of the rules of the game. This leads to relativism, where there is no rational choice to be made between competing games: all games are equally defensible.