A sentence is called a contingency if its truth table contains at least one 'T' and at least one 'F.'
Contingency
See also
Contradiction, Tautology, Truth TableExplore with Wolfram|Alpha
References
Carnap, R. Introduction to Symbolic Logic and Its Applications. New York: Dover, p. 13, 1958.Referenced on Wolfram|Alpha
ContingencyCite this as:
Weisstein, Eric W. "Contingency." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Contingency.html