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A comment on The beauty of bitwise AND. Parent comment

Re:The beauty of bitwise AND by jonsen on Thursday August 04, 2016 @03:22PM (#12227824)
In this decimal digit context it would be appropriate to define

  NOT d = 9 - d
Similar to

  NOT b = 1 - b
for binary digits. And in fuzzy logic.

Taking the logic identity

  a XOR b = ( a AND NOT b ) OR ( NOT a AND b )
it would be

  MAX( MIN( a, NOT( b ) ), MIN( NOT( a ), b ) )
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