Operator reference

Each logic class implements as many operators that make sense for it as possible. They have standardized names, signatures and semantics, as follows:

Shared by all logics

__and__ (&): And __or__ (|): Or __invert__ (~), __neg__ (-): Not __pos__ (+): Identity implies: Implication iff, xnor: Biconditional nor: Neither nand: Sheffer stroke abjunction: Nonimplication converse_implies: Converse implication converse_abjunction: Converse nonimplication

Optional

strong_conjunction: Strong conjunction; not (a implies (not b)) strong_disjunction: Strong disjunction; (not a) implies b diamond: Modal diamond; (not a) implies a box: Modal box; not diamond(not a) doubtful: a equivalent to (not a) gullibility: a if a is equivalent to b, uncertain otherwise consensus: a if a is equivalent to b; the other input if an input is uncertain, uncertain otherwise