All correct reasoning is a grand system of tautologies, but only God can make direct use of that fact
Propositions show what they say: tautologies and contradictions show that they say nothing.
Once the last trace of emotion has been eradicated, nothing remains of thought but absolute tautology.
All mathematics is tautology.
Being both entrepreneurial and social is no longer an oxymoron, but rather a tautology.
Reason is simply a vast tautology.
My mother was Irish and she was superstitious, if you'll forgive the tautology.