> Wittgenstein was insisting that a proposition and what it describes must have the same 'logical form', the same 'logical multiplicity'. Sraffa made a gesture, familiar to Neapolitans as meaning something like disgust or contempt, of brushing the underneath of his chin with an outward sweep of the finger-tips of one hand. And he asked: 'What is the logical form of that?'
> In the introduction to Philosophical Investigations, Wittgenstein mentions discussions with Sraffa over many years and says: "I am indebted to this stimulus for the most consequential ideas in this book".
Wittgenstein wrote two major books, the second of which basically undoes everything the first did. In the middle of that is Sraffa, presumably triggering a crisis of faith.
> In the introduction to Philosophical Investigations, Wittgenstein mentions discussions with Sraffa over many years and says: "I am indebted to this stimulus for the most consequential ideas in this book".
Wittgenstein wrote two major books, the second of which basically undoes everything the first did. In the middle of that is Sraffa, presumably triggering a crisis of faith.
[0] https://en.wikipedia.org/wiki/Piero_Sraffa#Personal_connecti...