In Other Theories
Intuitionistic type theory uses types in the place of truth values.
Topos theory uses truth values in a special sense: the truth values of a topos are the global elements of the subobject classifier. Having truth values in this sense does not make a logic truth valuational.
Read more about this topic: True And False
Famous quotes containing the word theories:
“A work of art that contains theories is like an object on which the price tag has been left.”
—Marcel Proust (1871–1922)