Examples with Term nars.language.Term used on opensource projects

Example 96 with Term

use of nars.language.Term in project opennars by opennars.

the class StructuralRules method transformPredicatePI.

/**
 * Equivalent transformation between products and images when the predicate
 * is a compound {<(*, S, M) --> P>, S@(*, S, M)} |- <S --> (/, P, _, M)>
 * {<S --> (/, P, _, M)>, P@(/, P, _, M)} |- <(*, S, M) --> P> {<S --> (/,
 * P, _, M)>, M@(/, P, _, M)} |- <M --> (/, P, S, _)>
 *
 * @param subject The subject term
 * @param predicate The predicate term
 * @param nal Reference to the memory
 */
private static void transformPredicatePI(short index, Term subject, CompoundTerm predicate, DerivationContext nal) {
    TruthValue truth = nal.getCurrentTask().sentence.truth;
    BudgetValue budget;
    Inheritance inheritance;
    Term newSubj, newPred;
    if (predicate instanceof Product) {
        Product product = (Product) predicate;
        short i = index;
        /*for (short i = 0; i < product.size(); i++)*/
        {
            newSubj = ImageInt.make(product, subject, i);
            newPred = product.term[i];
            inheritance = Inheritance.make(newSubj, newPred);
            if (inheritance != null) {
                if (truth == null) {
                    budget = BudgetFunctions.compoundBackward(inheritance, nal);
                } else {
                    budget = BudgetFunctions.compoundForward(truth, inheritance, nal);
                }
                nal.singlePremiseTask(inheritance, truth, budget);
            }
        }
    } else if (predicate instanceof ImageExt) {
        ImageExt image = (ImageExt) predicate;
        int relationIndex = image.relationIndex;
        for (short i = 0; i < image.size(); i++) {
            if (i == relationIndex) {
                newSubj = Product.make(image, subject, relationIndex);
                newPred = image.term[relationIndex];
            } else {
                newSubj = image.term[i];
                newPred = ImageExt.make(image, subject, i);
            }
            if (newSubj instanceof CompoundTerm && (newPred.equals(Term.SEQ_TEMPORAL) || newPred.equals(Term.SEQ_SPATIAL))) {
                Term seq = Conjunction.make(((CompoundTerm) newSubj).term, TemporalRules.ORDER_FORWARD, newPred.equals(Term.SEQ_SPATIAL));
                if (truth == null) {
                    budget = BudgetFunctions.compoundBackward(seq, nal);
                } else {
                    budget = BudgetFunctions.compoundForward(truth, seq, nal);
                }
                nal.singlePremiseTask(seq, truth, budget);
                return;
            }
            inheritance = Inheritance.make(newSubj, newPred);
            if (inheritance != null) {
                // jmv <<<<<
                if (truth == null) {
                    budget = BudgetFunctions.compoundBackward(inheritance, nal);
                } else {
                    budget = BudgetFunctions.compoundForward(truth, inheritance, nal);
                }
                nal.singlePremiseTask(inheritance, truth, budget);
            }
        }
    }
}

Example 97 with Term

use of nars.language.Term in project opennars by opennars.

the class StructuralRules method structuralCompound.

/* --------------- Disjunction and Conjunction transform --------------- */
/**
 * {(&&, A, B), A@(&&, A, B)} |- A, or answer (&&, A, B)? using A {(||, A,
 * B), A@(||, A, B)} |- A, or answer (||, A, B)? using A
 *
 * @param compound The premise
 * @param component The recognized component in the premise
 * @param compoundTask Whether the compound comes from the task
 * @param nal Reference to the memory
 */
static boolean structuralCompound(CompoundTerm compound, Term component, boolean compoundTask, int index, DerivationContext nal) {
    if (compound instanceof Conjunction) {
        if (nal.getCurrentTask().getTerm() == compound) {
            // only for # for now, will be gradually applied to &/ later
            Conjunction conj = (Conjunction) compound;
            if (conj.getTemporalOrder() == TemporalRules.ORDER_FORWARD && conj.isSpatial) {
                // and some also to && &|
                // flattenSequence(compound, component, compoundTask, index, nal);
                groupSequence(compound, component, compoundTask, index, nal);
                // takeOutFromConjunction(compound, component, compoundTask, index, nal);
                splitConjunctionApart(compound, component, compoundTask, index, nal);
            }
            if (conj.getTemporalOrder() == TemporalRules.ORDER_FORWARD) {
                seqToImage(conj, index, nal);
            }
        }
    }
    if (component.hasVarIndep()) {
        // moved down here since flattening also works when indep
        return false;
    }
    // and also for &/ with index > 0
    if ((compound instanceof Conjunction) && !compound.getIsSpatial() && (compound.getTemporalOrder() == TemporalRules.ORDER_FORWARD) && (index != 0)) {
        return false;
    }
    final Term content = compoundTask ? component : compound;
    Task task = nal.getCurrentTask();
    Sentence sentence = task.sentence;
    TruthValue truth = sentence.truth;
    final float reliance = Parameters.reliance;
    BudgetValue budget;
    if (sentence.isQuestion() || sentence.isQuest()) {
        budget = BudgetFunctions.compoundBackward(content, nal);
    } else {
        // [03:25] <patham9> <a --> b>.     (&&,<a --> b>,<x --> y>).   =>    <x --> y>
        if ((sentence.isJudgment() || sentence.isGoal()) && ((!compoundTask && compound instanceof Disjunction) || (compoundTask && compound instanceof Conjunction))) {
            truth = TruthFunctions.deduction(truth, reliance);
        } else {
            TruthValue v1, v2;
            v1 = TruthFunctions.negation(truth);
            v2 = TruthFunctions.deduction(v1, reliance);
            truth = TruthFunctions.negation(v2);
        }
        budget = BudgetFunctions.forward(truth, nal);
    }
    return nal.singlePremiseTask(content, truth, budget);
}

Example 98 with Term

use of nars.language.Term in project opennars by opennars.

the class StructuralRules method contraposition.

/**
 * {<A ==> B>, A@(--, A)} |- <(--, B) ==> (--, A)>
 *
 * @param statement The premise
 * @param memory Reference to the memory
 */
protected static boolean contraposition(final Statement statement, final Sentence sentence, final DerivationContext nal) {
    Memory memory = nal.mem();
    // memory.logic.CONTRAPOSITION.commit(statement.complexity);
    Term subj = statement.getSubject();
    Term pred = statement.getPredicate();
    Statement content = Statement.make(statement, Negation.make(pred), Negation.make(subj), TemporalRules.reverseOrder(statement.getTemporalOrder()));
    if (content == null)
        return false;
    TruthValue truth = sentence.truth;
    BudgetValue budget;
    if (sentence.isQuestion() || sentence.isQuest()) {
        if (content instanceof Implication) {
            budget = BudgetFunctions.compoundBackwardWeak(content, nal);
        } else {
            budget = BudgetFunctions.compoundBackward(content, nal);
        }
        return nal.singlePremiseTask(content, Symbols.QUESTION_MARK, truth, budget);
    } else {
        if (content instanceof Implication) {
            truth = TruthFunctions.contraposition(truth);
        }
        budget = BudgetFunctions.compoundForward(truth, content, nal);
        return nal.singlePremiseTask(content, Symbols.JUDGMENT_MARK, truth, budget);
    }
}

Example 99 with Term

use of nars.language.Term in project opennars by opennars.

the class StructuralRules method transformProductImage.

/* -------------------- products and images transform -------------------- */
/**
 * Equivalent transformation between products and images {<(*, S, M) --> P>,
 * S@(*, S, M)} |- <S --> (/, P, _, M)> {<S --> (/, P, _, M)>, P@(/, P, _,
 * M)} |- <(*, S, M) --> P> {<S --> (/, P, _, M)>, M@(/, P, _, M)} |- <M -->
 * (/, P, S, _)>
 *
 * @param inh An Inheritance statement
 * @param oldContent The whole content
 * @param indices The indices of the TaskLink
 * @param task The task
 * @param memory Reference to the memory
 */
static void transformProductImage(Inheritance inh, CompoundTerm oldContent, short[] indices, DerivationContext nal) {
    final Memory memory = nal.mem();
    Term subject = inh.getSubject();
    Term predicate = inh.getPredicate();
    short index = indices[indices.length - 1];
    short side = indices[indices.length - 2];
    if (inh.equals(oldContent)) {
        if (subject instanceof CompoundTerm) {
            transformSubjectPI(index, (CompoundTerm) subject, predicate, nal);
        }
        if (predicate instanceof CompoundTerm) {
            transformPredicatePI(index, subject, (CompoundTerm) predicate, nal);
        }
        return;
    }
    Term compT = inh.term[side];
    if (!(compT instanceof CompoundTerm))
        return;
    CompoundTerm comp = (CompoundTerm) compT;
    if (comp instanceof Product) {
        if (side == 0) {
            subject = comp.term[index];
            predicate = ImageExt.make((Product) comp, inh.getPredicate(), index);
        } else {
            subject = ImageInt.make((Product) comp, inh.getSubject(), index);
            predicate = comp.term[index];
        }
    } else if ((comp instanceof ImageExt) && (side == 1)) {
        if (index == ((ImageExt) comp).relationIndex) {
            subject = Product.make(comp, inh.getSubject(), index);
            predicate = comp.term[index];
        } else {
            subject = comp.term[index];
            predicate = ImageExt.make((ImageExt) comp, inh.getSubject(), index);
        }
    } else if ((comp instanceof ImageInt) && (side == 0)) {
        if (index == ((ImageInt) comp).relationIndex) {
            subject = comp.term[index];
            predicate = Product.make(comp, inh.getPredicate(), index);
        } else {
            subject = ImageInt.make((ImageInt) comp, inh.getPredicate(), index);
            predicate = comp.term[index];
        }
    } else {
        return;
    }
    CompoundTerm newInh = null;
    if (predicate.equals(Term.SEQ_SPATIAL)) {
        newInh = (CompoundTerm) Conjunction.make(((CompoundTerm) subject).term, TemporalRules.ORDER_FORWARD, true);
    } else if (predicate.equals(Term.SEQ_TEMPORAL)) {
        newInh = (CompoundTerm) Conjunction.make(((CompoundTerm) subject).term, TemporalRules.ORDER_FORWARD, false);
    } else {
        newInh = Inheritance.make(subject, predicate);
    }
    if (newInh == null)
        return;
    CompoundTerm content = null;
    if (indices.length == 2) {
        content = newInh;
    } else if ((oldContent instanceof Statement) && (indices[0] == 1)) {
        content = Statement.make((Statement) oldContent, oldContent.term[0], newInh, oldContent.getTemporalOrder());
    } else {
        Term[] componentList;
        Term condition = oldContent.term[0];
        if (((oldContent instanceof Implication) || (oldContent instanceof Equivalence)) && (condition instanceof Conjunction)) {
            componentList = ((CompoundTerm) condition).cloneTerms();
            componentList[indices[1]] = newInh;
            Term newCond = Terms.term((CompoundTerm) condition, componentList);
            content = Statement.make((Statement) oldContent, newCond, ((Statement) oldContent).getPredicate(), oldContent.getTemporalOrder());
        } else {
            componentList = oldContent.cloneTerms();
            componentList[indices[0]] = newInh;
            if (oldContent instanceof Conjunction) {
                Term newContent = Terms.term(oldContent, componentList);
                if (!(newContent instanceof CompoundTerm))
                    return;
                content = (CompoundTerm) newContent;
            } else if ((oldContent instanceof Implication) || (oldContent instanceof Equivalence)) {
                content = Statement.make((Statement) oldContent, componentList[0], componentList[1], oldContent.getTemporalOrder());
            }
        }
    }
    if (content == null)
        return;
    Sentence sentence = nal.getCurrentTask().sentence;
    TruthValue truth = sentence.truth;
    BudgetValue budget;
    if (sentence.isQuestion() || sentence.isQuest()) {
        budget = BudgetFunctions.compoundBackward(content, nal);
    } else {
        budget = BudgetFunctions.compoundForward(truth, content, nal);
    }
    nal.singlePremiseTask(content, truth, budget);
}

Example 100 with Term

use of nars.language.Term in project opennars by opennars.

the class StructuralRules method structuralDecompose2.

/**
 * {<(S*T) --> (P*T)>, S@(S*T)} |- <S --> P>
 *
 * @param statement The premise
 * @param nal Reference to the memory
 */
static void structuralDecompose2(Statement statement, int index, DerivationContext nal) {
    Term subj = statement.getSubject();
    Term pred = statement.getPredicate();
    if (subj.getClass() != pred.getClass()) {
        return;
    }
    if (!(subj instanceof Product) && !(subj instanceof SetExt) && !(subj instanceof SetInt)) {
        // no abduction on other compounds for now, but may change in the future
        return;
    }
    CompoundTerm sub = (CompoundTerm) subj;
    CompoundTerm pre = (CompoundTerm) pred;
    if (sub.size() != pre.size() || sub.size() <= index) {
        return;
    }
    Term t1 = sub.term[index];
    Term t2 = pre.term[index];
    Statement content;
    int order = statement.getTemporalOrder();
    if (switchOrder(sub, (short) index)) {
        content = Statement.make(statement, t2, t1, TemporalRules.reverseOrder(order));
    } else {
        content = Statement.make(statement, t1, t2, order);
    }
    if (content == null) {
        return;
    }
    Task task = nal.getCurrentTask();
    Sentence sentence = task.sentence;
    TruthValue truth = sentence.truth;
    BudgetValue budget;
    if (sentence.isQuestion() || sentence.isQuest()) {
        budget = BudgetFunctions.compoundBackward(content, nal);
    } else {
        budget = BudgetFunctions.compoundForward(truth, content, nal);
    }
    nal.singlePremiseTask(content, truth, budget);
}