Don’t rely on logic alone, nor speculation. Don’t infer or be deceived by appearances. — Gautama Buddha
…mathematics is distinguished from all other sciences except only ethics, in standing — Charles Sanders Peirce
Man associates ideas not according to logic or verifiable exactitude, but according — Remy de Gourmont
Dialectical logic undoes the abstractions of formal logic and of transcendental philosophy, — Herbert Marcuse
Civilized people are taught by logic, barbarians, by necessity, communities by tradition; — Marcus Tullius Cicero