Nand
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Nand (⍲
) is a dyadic scalar boolean function which tests if either argument is not true: it returns 0 if both are 1 and 1 if at least one is 0. It represents the Sheffer stroke or alternative denial in Boolean logic. Nand is the boolean negation ~
of the And 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 
1

1

1 
0

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