Full Idea
That there are minds and thinking beings in other men as well as himself, every man has a reason, from their words and actions, to be satisfied.
Gist of Idea
We are satisfied that other men have minds, from their words and actions
Source
John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 4.03.27)
Book Reference
Locke,John: 'Essay Concerning Human Understanding', ed/tr. Nidditch,P.H. [OUP 1979], p.558
A Reaction
Locke is aware of the question of other minds, but is rather easily fobbed off with an answer. He hadn't thought enough about good robots, for all his imagination, and Descartes' mention of them.