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Entity > Abstract > Class > Relation > BinaryRelation > UnaryFunction > TruthFn

TruthFn
subject			fact

TruthFn	documentation The function mapping Sentences to TruthValues
	has domain1 Sentence
	has domain2 TruthValue
	is an instance of UnaryFunction
UnaryFunction	has axiom (<=> (and (holds ?REL ?INST1 ?INST2) (instance ?REL UnaryFunction)) (equal (AssignmentFn ?REL ?INST1) ?INST2))
	has axiom (=> (and (closedOn ?FUNCTION ?CLASS) (instance ?FUNCTION UnaryFunction)) (forall (?INST) (=> (instance ?INST ?CLASS) (instance (AssignmentFn ?FUNCTION ?INST) ?CLASS))))
	has axiom (=> (and (instance ?FUNCTION UnaryFunction) (equal (AssignmentFn ?FUNCTION ?ARG) ?VALUE1) (equal (AssignmentFn ?FUNCTION ?ARG) ?VALUE2)) (equal ?VALUE1 ?VALUE2))
	has axiom (=> (instance ?FUNCTION UnaryFunction) (valence ?FUNCTION 1))
BinaryRelation	is first domain of DomainFn
	is first domain of equivalenceRelationOn
	is first domain of inverse
	is first domain of irreflexiveOn
	is first domain of partialOrderingOn
	is first domain of RangeFn
	is first domain of reflexiveOn
	is first domain of totalOrderingOn
	is first domain of trichotomizingOn
	is second domain of inverse
Function	is first domain of AssignmentFn
	is first domain of closedOn
	is first domain of range
	is first domain of rangeSubclass
Class	is third domain of domain
	is third domain of domainSubclass
Abstract	is disjoint from Physical

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