The Least Common Denominator Is a Least Common Denominator
From Ludwig Wittgenstein, Philosophical Investigations--
Someone might object against me: "You take the easy way out! You talk about all sorts of language-games, but have nowhere said what the essence of a language-game, and hence of language, is: what is common to all these activities, and what makes them into language or parts of language. So you let yourself off the very part of the investigation that once gave you yourself most headache, the part about the general form of propositions and of language."
And this is true. ---Instead of producing something common to all that we call language, I am saying that these phenomena have no one thing in common which makes us use the same word for all, ---but that they are related to one another in many different ways. And it is because of this relationship, or these relationships, that we call them all "language."