November 21, 2013: Kenneth G. Lucey
Department of Philosophy, University of Nevada, Reno
"A New Counter-Example to Modus Ponens"
Edmund J. Cain Hall, Room 108H
Modus Ponens [ If p then q; p / therefore q ] is essential to all human rational discourse. A counter-example to Modus Ponens poses a serious threat to all such discourse. This talk exhibits such an apparent counter-example, and assesses the intellectual cost of rejecting the example. Such costs are serious and include revising the standard definition of what it is to be a tautology.