/**
* Conditional deduction or induction, with variable unification
*
* @param conditional The premise that is an Implication with a Conjunction as condition
* @param index The location of the shared term in the condition
* @param statement The second premise that is a statement
* @param side The location of the shared term in the statement
* @param memory Reference to the memory
*/
private static void conditionalDedIndWithVar(
Implication conditional, short index, Statement statement, short side, Memory memory) {
CompoundTerm condition = (CompoundTerm) conditional.getSubject();
Term component = condition.componentAt(index);
Term component2 = null;
if (statement instanceof Inheritance) {
component2 = statement;
side = -1;
} else if (statement instanceof Implication) {
component2 = statement.componentAt(side);
}
if ((component2 != null)
&& Variable.unify(Symbols.VAR_INDEPENDENT, component, component2, conditional, statement)) {
SyllogisticRules.conditionalDedInd(conditional, index, statement, side, memory);
}
}
/**
* The detachment rule, with variable unification
*
* @param originalMainSentence The premise that is an Implication or Equivalence
* @param subSentence The premise that is the subject or predicate of the first one
* @param index The location of the second premise in the first
* @param memory Reference to the memory
*/
private static void detachmentWithVar(
Sentence originalMainSentence, Sentence subSentence, int index, Memory memory) {
Sentence mainSentence = (Sentence) originalMainSentence.clone(); // for substitution
Statement statement = (Statement) mainSentence.getContent();
Term component = statement.componentAt(index);
Term content = subSentence.getContent();
if ((component instanceof Inheritance) && (memory.currentBelief != null)) {
if (component.isConstant()) {
SyllogisticRules.detachment(mainSentence, subSentence, index, memory);
} else if (Variable.unify(Symbols.VAR_INDEPENDENT, component, content, statement, content)) {
SyllogisticRules.detachment(mainSentence, subSentence, index, memory);
} else if ((statement instanceof Implication)
&& (statement.getPredicate() instanceof Statement)
&& (memory.currentTask.getSentence().isJudgment())) {
Statement s2 = (Statement) statement.getPredicate();
if (s2.getSubject().equals(((Statement) content).getSubject())) {
CompositionalRules.introVarInner((Statement) content, s2, statement, memory);
}
}
}
}
