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 |
