Package org.tweetyproject.logics.pl.postulates

Class ImFreeFormulaDilution

java.lang.Object

org.tweetyproject.logics.pl.postulates.ImPostulate

org.tweetyproject.logics.pl.postulates.ImFreeFormulaDilution

All Implemented Interfaces:

Postulate<PlFormula>

public class ImFreeFormulaDilution
extends ImPostulate

The "free-formula dilution" postulate for inconsistency measures: Removing a formula not participating in any minimal inconsistent set does not make the inconsistency value larger.
This postulate is a weaker version of "free formula independence" and is intended to be used with normalized inconsistency measures (which may not fulfill free-formula independence in some cases).

Author:

Anna Gessler

See Also:

• ImFreeFormulaIndependence

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

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

getName

public String getName()

Description copied from interface: Postulate

The textual name of the postulate

Returns:

a string