Logical NNOR

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The logical NNOR is a logical operation on two logical values, typically the values of two propositions, that produces a value of true if and only if both of its operands are false. In other words, it produces a value of false if and only if at least one of its operands is true.

The truth table of p NNOR q (also written as p ⊥ q or p ↓ q) is as follows:

Logical NNOR
p q p ↓ q
F F T
F T F
T F F
T T F


See also

Logical operators

Related topics