Enum ManyValuedTruth 

pub enum ManyValuedTruth {
    True,
    False,
    Both,
    Neither,
    Fuzzy(f64),
}

A truth value in a many-valued logic.

Variants

True

True.

False

False.

Both

Both true and false (glutted).

Neither

Neither true nor false (gapped).

Fuzzy(f64)

A numerical value in [0, 1] (fuzzy).

Implementations

impl ManyValuedTruth

pub fn is_designated(&self) -> bool

Is this value “designated” (true-like) in LP/FDE.

pub fn kleene_and(a: &ManyValuedTruth, b: &ManyValuedTruth) -> ManyValuedTruth

Kleene three-valued conjunction: A ∧ B.

pub fn kleene_or(a: &ManyValuedTruth, b: &ManyValuedTruth) -> ManyValuedTruth

Kleene three-valued disjunction: A ∨ B.

pub fn kleene_not(a: &ManyValuedTruth) -> ManyValuedTruth

Kleene three-valued negation: ¬A.

Trait Implementations

impl Clone for ManyValuedTruth

fn clone(&self) -> ManyValuedTruth

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ManyValuedTruth

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for ManyValuedTruth

fn eq(&self, other: &ManyValuedTruth) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ManyValuedTruth