Ejemplo n.º 1
0
 /**
  * {<(&&, S1, S2, S3) ==> P>, S1} |- <(&&, S2, S3) ==> P> {<(&&, S2, S3) ==> P>, <S1 ==> S2>} |-
  * <(&&, S1, S3) ==> P> {<(&&, S1, S3) ==> P>, <S1 ==> S2>} |- <(&&, S2, S3) ==> P>
  *
  * @param premise1 The conditional premise
  * @param index The location of the shared term in the condition of premise1
  * @param premise2 The premise which, or part of which, appears in the condition of premise1
  * @param side The location of the shared term in premise2: 0 for subject, 1 for predicate, -1 for
  *     the whole term
  */
 static void conditionalDedInd(Implication premise1, short index, Term premise2, int side) {
   Task task = Memory.currentTask;
   Sentence taskSentence = task.getSentence();
   Judgment belief = Memory.currentBelief;
   boolean deduction = (side != 0);
   HashMap substitute =
       Variable.findSubstitute(Variable.VarType.ALL, premise2, belief.getContent());
   boolean conditionalTask = (substitute != null);
   TemporalValue tense1 = (conditionalTask ? taskSentence.getTense() : belief.getTense());
   TemporalValue tense2 = (conditionalTask ? belief.getTense() : taskSentence.getTense());
   TemporalValue order1 = premise1.getOrder();
   TemporalValue order2 = premise2.getOrder();
   if ((side == -1) && (tense2 != null) && (tense2.getDelta() > 0)) {
     return;
   }
   if ((side == 0) && (order2 != null) && (order2.getDelta() > 0)) {
     return;
   }
   if ((side == 1) && (order2 != null) && (order2.getDelta() < 0)) {
     return;
   }
   TemporalValue tense = TemporalRules.syllogistic(tense1, tense2);
   if (tense != null) {
     tense = new TemporalValue(0);
   }
   Term commonComponent;
   Term newComponent = null;
   if (side == 0) {
     commonComponent = ((RDFStatement) premise2).getSubject();
     newComponent = ((RDFStatement) premise2).getPredicate();
   } else if (side == 1) {
     commonComponent = ((RDFStatement) premise2).getPredicate();
     newComponent = ((RDFStatement) premise2).getSubject();
   } else {
     commonComponent = premise2;
   }
   Conjunction oldCondition = (Conjunction) premise1.getSubject();
   boolean match =
       Variable.unify(
           Variable.VarType.INDEPENDENT,
           oldCondition.componentAt(index),
           commonComponent,
           premise1,
           premise2);
   if (!match && (commonComponent.getClass() == oldCondition.getClass())) {
     match =
         Variable.unify(
             Variable.VarType.INDEPENDENT,
             oldCondition.componentAt(index),
             ((CompoundTerm) commonComponent).componentAt(index),
             premise1,
             premise2);
   }
   if (!match) {
     return;
   }
   Term newCondition;
   if (oldCondition.equals(commonComponent)) {
     newCondition = null;
   } else {
     newCondition = CompoundTerm.replaceComponent(oldCondition, index, newComponent);
     if ((newCondition instanceof Conjunction) && ((CompoundTerm) newCondition).size() == 1) {
       newCondition = ((CompoundTerm) newCondition).componentAt(0);
     }
   }
   Term content;
   if (newCondition != null) {
     content = RDFStatement.make(premise1, newCondition, premise1.getPredicate(), order1);
   } else {
     content = premise1.getPredicate();
   }
   if (content == null) {
     return;
   }
   TruthValue truth1 = taskSentence.getTruth();
   TruthValue truth2 = belief.getTruth();
   TruthValue truth = null;
   BudgetValue budget;
   if (taskSentence instanceof Question) {
     budget = BudgetFunctions.backwardWeak(truth2);
   } else {
     if (taskSentence instanceof Goal) {
       if (conditionalTask) {
         truth = TruthFunctions.desireWeak(truth1, truth2);
       } else if (deduction) {
         truth = TruthFunctions.desireInd(truth1, truth2);
       } else {
         truth = TruthFunctions.desireDed(truth1, truth2);
       }
       budget = BudgetFunctions.forward(truth);
     } else {
       if (deduction) {
         truth = TruthFunctions.deduction(truth1, truth2);
       } else if (conditionalTask) {
         truth = TruthFunctions.induction(truth2, truth1);
       } else {
         truth = TruthFunctions.induction(truth1, truth2);
       }
     }
     budget = BudgetFunctions.forward(truth);
   }
   Memory.currentTense = tense;
   Memory.doublePremiseTask(budget, content, truth);
 }
Ejemplo n.º 2
0
 /**
  * {<(&&, S2, S3) ==> P>, <(&&, S1, S3) ==> P>} |- <S1 ==> S2>
  *
  * @param cond1 The condition of the first premise
  * @param cond2 The condition of the second premise
  * @param st1 The first premise
  * @param st2 The second premise
  * @return Whether there are derived tasks
  */
 static boolean conditionalAbd(Term cond1, Term cond2, RDFStatement st1, RDFStatement st2) {
   if (!(st1 instanceof Implication) || !(st2 instanceof Implication)) {
     return false;
   }
   if (!(cond1 instanceof Conjunction) && !(cond2 instanceof Conjunction)) {
     return false;
   }
   TemporalValue order1 = st1.getOrder();
   TemporalValue order2 = st2.getOrder();
   if (order1 != order2) {
     return false;
   }
   Term term1 = null;
   Term term2 = null;
   if (cond1 instanceof Conjunction) {
     term1 = CompoundTerm.reduceComponents((Conjunction) cond1, cond2);
   }
   if (cond2 instanceof Conjunction) {
     term2 = CompoundTerm.reduceComponents((Conjunction) cond2, cond1);
   }
   if ((term1 == null) && (term2 == null)) {
     return false;
   }
   Task task = Memory.currentTask;
   Sentence sentence = task.getSentence();
   Judgment belief = Memory.currentBelief;
   TruthValue value1 = sentence.getTruth();
   TruthValue value2 = belief.getTruth();
   boolean keepOrder =
       (Variable.findSubstitute(Variable.VarType.INDEPENDENT, st1, task.getContent()) != null);
   Term content;
   TruthValue truth = null;
   BudgetValue budget;
   if (term1 != null) {
     if (term2 != null) {
       content = RDFStatement.make(st2, term2, term1, order2);
     } else {
       content = term1;
     }
     if (sentence instanceof Question) {
       budget = BudgetFunctions.backwardWeak(value2);
     } else {
       if (sentence instanceof Goal) {
         if (keepOrder) {
           truth = TruthFunctions.desireDed(value1, value2);
         } else {
           truth = TruthFunctions.desireInd(value1, value2);
         }
       } else {
         truth = TruthFunctions.abduction(value2, value1);
       }
       budget = BudgetFunctions.forward(truth);
     }
     Memory.doublePremiseTask(budget, content, truth);
   }
   if (term2 != null) {
     if (term1 != null) {
       content = RDFStatement.make(st1, term1, term2, order1);
     } else {
       content = term2;
     }
     if (sentence instanceof Question) {
       budget = BudgetFunctions.backwardWeak(value2);
     } else {
       if (sentence instanceof Goal) {
         if (keepOrder) {
           truth = TruthFunctions.desireDed(value1, value2);
         } else {
           truth = TruthFunctions.desireInd(value1, value2);
         }
       } else {
         truth = TruthFunctions.abduction(value1, value2);
       }
       budget = BudgetFunctions.forward(truth);
     }
     Memory.currentTense = null;
     Memory.doublePremiseTask(budget, content, truth);
   }
   return true;
 }
Ejemplo n.º 3
0
 /**
  * {<<M --> S> ==> <M --> P>>, <M --> S>} |- <M --> P> {<<M --> S> ==> <M --> P>>, <M --> P>} |-
  * <M --> S>
  *
  * @param mainSentence The implication/equivalence premise
  * @param subSentence The premise on part of s1
  * @param s The location of s2 in s1
  */
 static void detachment(Sentence mainSentence, Sentence subSentence, int s) {
   RDFStatement statement = (RDFStatement) mainSentence.getContent();
   Term subject = statement.getSubject();
   Term predicate = statement.getPredicate();
   Term term = subSentence.getContent();
   Term content;
   int side;
   if (term.equals(subject)) {
     side = 0;
     content = predicate;
   } else if (term.equals(predicate)) {
     side = 1;
     content = subject;
   } else {
     return;
   }
   if ((content instanceof RDFStatement) && ((RDFStatement) content).invalid()) {
     return;
   }
   Sentence taskSentence = Memory.currentTask.getSentence();
   Sentence beliefSentence = Memory.currentBelief;
   TruthValue beliefTruth = beliefSentence.getTruth();
   TruthValue truth1 = mainSentence.getTruth();
   TruthValue truth2 = subSentence.getTruth();
   TruthValue truth = null;
   BudgetValue budget;
   if (taskSentence instanceof Question) {
     if (statement instanceof Equivalence) {
       budget = BudgetFunctions.backward(beliefTruth);
     } else if (side == 0) {
       budget = BudgetFunctions.backwardWeak(beliefTruth);
     } else {
       budget = BudgetFunctions.backward(beliefTruth);
     }
   } else {
     if (taskSentence instanceof Goal) {
       if (statement instanceof Equivalence) {
         truth = TruthFunctions.desireStrong(truth1, truth2);
       } else if (side == 0) {
         truth = TruthFunctions.desireInd(truth1, truth2);
       } else {
         truth = TruthFunctions.desireDed(truth1, truth2);
       }
     } else {
       if (statement instanceof Equivalence) {
         truth = TruthFunctions.analogy(truth1, truth2);
       } else if (side == 0) {
         truth = TruthFunctions.deduction(truth1, truth2);
       } else {
         truth = TruthFunctions.abduction(truth2, truth1);
       }
     }
     budget = BudgetFunctions.forward(truth);
   }
   TemporalValue tense0 = subSentence.getTense();
   TemporalValue order0 = statement.getOrder();
   TemporalValue tense;
   if (order0 == null) {
     tense = tense0;
   } else if (side == 0) {
     tense = TemporalRules.tenseSyllogistic(tense0, subSentence.getCreationTime(), order0);
   } else {
     tense =
         TemporalRules.tenseSyllogistic(
             tense0, subSentence.getCreationTime(), TemporalValue.getReverse(order0));
   }
   Memory.currentTense = tense;
   Memory.doublePremiseTask(budget, content, truth);
 }