All correct reasoning is a grand system of tautologies, but only God can make direct use of that fact. — Herbert Simon Copy Share Image
Pure logic could never lead us to anything but tautologies; it can create nothing new; not from it alone can any science… — Henri Poincare Copy Share Image
Propositions show what they say: tautologies and contradictions show that they say nothing. — Ludwig Wittgenstein Copy Share Image
A logic proof is: you get a starting point and an ending point, and you have to get there through all these… — Heidi Julavits Copy Share Image
Logic issues in tautologies, mathematics in identities, philosophy in definitions; all trivial, but all part of the vital work of clarifying and… — Anonymous Copy Share Image
