Nor

Nor[e1,e2,…] is the logical NOR function. It evaluates its arguments in order, giving False immediately if any of them are True, and True if they are all False.

Examples

Nor of all False values:

Nor[False, False, False]
(* True *)

Nor with a True value:

Nor[False, True, False]
(* False *)

Please visit the official Wolfram Language Reference for more details.