Full Idea
Belief is something of an explanatory construct: we attribute beliefs to others largely in order to explain their behaviour.
Gist of Idea
We attribute beliefs to people in order to explain their behaviour
Source
David J.Chalmers (The Conscious Mind [1996], 1.1.3)
Book Reference
Chalmers,David J.: 'The Conscious Mind' [OUP 1997], p.19