Common Truth Functions

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For reference here are a few of the truth functions commonly named in propositional calculus and their operators.

Negation  or
Joint Denial  or
Exclusive Disjunction  or
Alternative Denial  or
Conjunction or
Biconditional  or
Conditional  or
Disjunction  or

Contradiction A contradiction returns zero for all condition values.

Tautology A tautology returns one for all condition values.

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