Full Idea
Logic gives the method of research in philosophy, just as mathematics gives the method in physics.
Gist of Idea
Logic gives the method of research in philosophy
Source
Bertrand Russell (Our Knowledge of the External World [1914], 8)
Book Reference
Russell,Bertrand: 'Our Knowledge of the External World' [Routledge 1993], p.243
A Reaction
I'm struck by how rarely philosophers actually prove anything. Mostly they just use the language of logic as a tool for disambiguation. Only a tiny handful of philosophers can actually create sustained and novel proofs.