Nor
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⍱

Nor (⍱
) is a dyadic scalar boolean function which tests if neither argument is true: it returns 1 if both are 0 and 0 if at least one is 1. It represents Peirce's arrow or joint denial in Boolean logic. Nor is the boolean negation ~
of the Or function ∨
, and so its glyph is composed from those. However, fonts vary in how they compose them; some overlaying the glyphs (∨̴), and some stacking them (∨̃).
⍱ 
0 
1


0

1 
0

1

0 
0

Examples
The following shows all possible combinations of inputs as a Boolean function.
0 0 1 1 ⍱ 0 1 0 1
1 0 0 0