What Wittgenstein Owed to Sraffa - Wittgenstein acknowledges a debt to Sraffa whom he puts above Ramsey. With Spengler, Sraffa gave him his second (or perhaps third) philosophy. The idea of fami - ly resemblance (Spengler) and the realization that he had to accept as a sign something for which he could not give the rules and grammar (Sraffa) taught him that there was no essence of language, no realm of meaning to be tapped into. What is the nature of grammar? This was the crucial turn away from the Tractatus: we do not find grammar inside language, we impose it from outside. It is our set of models that we apply of course not rigorously for Wittgenstein and Sraffa shared an aversion to generalization. There were lots of different rule-books towards which we had different attitudes and reactions.