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In Classical Logic , the only possible truth values are True and False .
However, other values are possible in other logics:
Fuzzy Logic and other forms of Multi-valued Logic use more truth values than simply true and false.

Algebraically, the set {true, false} forms a two-element uses Heyting Algebra s.

In Topos Theory , the Subobject Classifier of a topos takes the place of the set of truth values.

  • The truth value of a Proposition is shown using '''0s''' and '''1s'''.

  • : True = 1

: False = 0


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