Xnor

Xnor[e1, e2, ...] is the logical XNOR (not XOR) function. It gives True if an even number of the ei are True, and the rest are False.

Examples

Basic XNOR:

Xnor[True, True]
(* True *)

Xnor[True, False]
(* False *)

Xnor[False, False]
(* True *)

Please visit the official Wolfram Language Reference for more details.