Package org.tweetyproject.logics.pl.postulates

Class ImContradiction

java.lang.Object

org.tweetyproject.logics.pl.postulates.ImPostulate

org.tweetyproject.logics.pl.postulates.ImContradiction

All Implemented Interfaces:

Postulate<PlFormula>

public class ImContradiction
extends ImPostulate

The "contradiction" postulate for inconsistency measures: A knowledge base is maximally inconsistent if all non-empty subsets are inconsistent. This postulate is supposed to be an extension of the "normalization" postulate, meaning 1 is the maximum inconsistency value.

Author:

Anna Gessler

See Also:

• ImNormalization

Field Summary

Fields inherited from class org.tweetyproject.logics.pl.postulates.ImPostulate

ADJUNCTIONINVARIANCE, ATTENUATION, CONSISTENCY, CONTRADICTION, DOMINANCE, EQUALCONFLICT, EXCHANGE, FREEFORMULADILUTION, FREEFORMULAINDEPENDENCE, IRRELEVANCEOFSYNTAX, MINORMALIZATION, MISEPARABILITY, MONOTONY, NORMALIZATION, PENALTY, SAFEFORMULAINDEPENDENCE, SUPERADDITIVITY, WEAKDOMINANCE

Method Summary

Modifier and Type	Method	Description
String	getName()	The textual name of the postulate
boolean	isApplicable(Collection<PlFormula> kb)	Checks whether the given kb represents a non-trivial instance for this postulate, i.e., whether assumptions of this postulates are satisfied (evaluating an approach on a non-applicable instance always succeeds).
boolean	isSatisfied(Collection<PlFormula> kb, BeliefSetInconsistencyMeasure<PlFormula> ev)	Return whether the formulas are satisfied

Methods inherited from class org.tweetyproject.logics.pl.postulates.ImPostulate

isSatisfied

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getName

public String getName()

Description copied from interface: Postulate

The textual name of the postulate

Returns:

a string

isApplicable

public boolean isApplicable(Collection<PlFormula> kb)

Description copied from interface: Postulate

Checks whether the given kb represents a non-trivial instance for this postulate, i.e., whether assumptions of this postulates are satisfied (evaluating an approach on a non-applicable instance always succeeds).

Specified by:

isApplicable in interface Postulate<PlFormula>

Specified by:

isApplicable in class ImPostulate

Parameters:

kb - some knowledge base

Returns:

true if the knowledge base is a non trivial instance of this postulate.

isSatisfied

public boolean isSatisfied(Collection<PlFormula> kb,
 BeliefSetInconsistencyMeasure<PlFormula> ev)

Description copied from class: ImPostulate

Return whether the formulas are satisfied

Specified by:

isSatisfied in class ImPostulate

Parameters:

kb - collection of formulas

ev - BeliefSet Inconsistency Measure

Returns:

whether the formulas are satisfied