Full Idea
We can think of "rational certainty" as a matter of victory in argument rather than relation to an object known.
Gist of Idea
Rational certainty may be victory in argument rather than knowledge of facts
Source
Richard Rorty (Philosophy and the Mirror of Nature [1980], 3.4)
Book Reference
Rorty,Richard: 'Philosophy and the Mirror of Nature' [Blackwell 1980], p.156