(philosophy) A conditional statement in which the conditionalclause is false, as "If I had arrived on time . . ."."counterfactual" in A Dictionary of Philosophical Terms and Names (Garth Kemerling, 1997-2002)Random House Webster's Unabridged Electronic Dictionary (1987-1996)
1952, B. J. Diggs, "VI.—Counterfactual Conditionals," Mind, vol. 61, no. 244, page 513:In recent years there has been increasing discussion of the "problem of counterfactuals". One way of formulating this problem is as follows: "What is meant when one asserts a conditional statement, the antecedent of which is contrary to fact?"