/**
* {<(&&, 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);
}
