The connective in logic corresponding to the exclusive nor operation. XNOR is equivalent to , where denotes AND, denotes OR, and denotes NOT. The circuit diagram symbol for an XNOR gate is illustrated above, and the XNOR truth table is given below for two arguments. For two arguments, " XNOR " is identical to " iff " and " is equivalent to " ().
XNOR | ||
T | T | T |
T | F | F |
F | T | F |
F | F | T |