Ejemplo n.º 1
0
 /**
  * {<M --> S>, <C ==> <M --> P>>} |- <(&&, <#x --> S>, C) ==> <#x --> P>> {<M --> S>, (&&, C, <M
  * --> P>)} |- (&&, C, <<#x --> S> ==> <#x --> P>>)
  *
  * @param premise1 The first premise directly used in internal induction, <M --> S>
  * @param premise2 The component to be used as a premise in internal induction, <M --> P>
  * @param oldCompound The whole content of the first premise, Implication or Conjunction
  */
 static void introVarIndInner(
     RDFStatement premise1, RDFStatement premise2, CompoundTerm oldCompound) {
   Task task = Memory.currentTask;
   Sentence taskSentence = task.getSentence();
   if (!taskSentence.isJudgment()) {
     return;
   }
   if (premise1.getClass() != premise2.getClass()) {
     return;
   }
   Variable var1 = new Variable(Symbols.VARIABLE_TAG + "0");
   Variable var2 = new Variable(Symbols.VARIABLE_TAG + "0");
   RDFStatement state1, state2;
   if (premise1.getSubject().equals(premise2.getSubject())) {
     state1 = RDFStatement.make(premise1, var1, premise1.getPredicate());
     state2 = RDFStatement.make(premise2, var2, premise2.getPredicate());
   } else if (premise1.getPredicate().equals(premise2.getPredicate())) {
     state1 = RDFStatement.make(premise1, premise1.getSubject(), var1);
     state2 = RDFStatement.make(premise2, premise2.getSubject(), var2);
   } else {
     return;
   }
   Sentence belief = Memory.currentBelief;
   Term compound, content;
   TemporalValue tense;
   TruthValue truth;
   if (premise1.equals(taskSentence.getContent())) {
     truth = TruthFunctions.abduction(taskSentence.getTruth(), belief.getTruth());
     tense = TemporalRules.tenseInduction(taskSentence.getTense(), belief.getTense());
   } else {
     truth = TruthFunctions.abduction(belief.getTruth(), taskSentence.getTruth());
     tense = TemporalRules.tenseInduction(belief.getTense(), taskSentence.getTense());
   }
   if (tense == null) {
     return;
   }
   if ((oldCompound instanceof Implication) && (tense == oldCompound.getOrder())) {
     compound = RDFStatement.make((RDFStatement) oldCompound, oldCompound.componentAt(0), state2);
     content = RDFStatement.make((RDFStatement) oldCompound, state1, compound);
   } else if (oldCompound instanceof Conjunction) {
     compound = Implication.make(state1, state2, tense);
     content = CompoundTerm.replaceComponent(oldCompound, premise2, compound);
   } else {
     return;
   }
   BudgetValue budget = BudgetFunctions.forward(truth);
   Memory.doublePremiseTask(budget, content, truth);
 }
Ejemplo n.º 2
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);
 }