irrefragible

Adjective

 * 1) * 1957 (2012), Arthur C. Clarke, "The Next Tenants", Tales from the "White Hart", RosettaBooks, ISBN 9780795325885
 * "I suppose not," replied Harry, with that air of irrefragible innocence which is so disconcerting to his critics.
 * "I suppose not," replied Harry, with that air of irrefragible innocence which is so disconcerting to his critics.