Full Idea
Mathematics has closer ties with logic than does almost any other discipline; for almost the entire activity of the mathematician consists in drawing inferences.
Gist of Idea
The closest subject to logic is mathematics, which does little apart from drawing inferences
Source
Gottlob Frege (Logic in Mathematics [1914], p.203)
Book Reference
Frege,Gottlob: 'Posthumous Writings', ed/tr. Hermes/Long/White etc [Blackwell 1979], p.203
A Reaction
The interesting question is who is in charge - the mathematician or the logician?