Full Idea
My attitude towards him is an attitude towards a soul. I am not of the 'opinion' that he has a soul.
Gist of Idea
I don't have the opinion that people have minds; I just treat them as such
Source
Ludwig Wittgenstein (Philosophical Investigations [1952], II.iv)
Book Reference
Wittgenstein,Ludwig: 'Philosophical Investigations', ed/tr. Anscombe,E. [Blackwell 1972], p.178
A Reaction
This seems to be precisely Dennett's 'intentional stance', where we conjure up minds in things like chess-playing computers, irrespective of whether we believe they are conscious.