/**
* *****************************************************************
*
* @return true if a quantifiers in a quantifier list is not found in the body of the statement.
*/
private static boolean quantifierNotInStatement(Formula f) {
if (f.theFormula == null || f.theFormula.length() < 1 || !f.listP() || f.empty()) return false;
if (!Arrays.asList("forall", "exists").contains(f.car())) {
Formula f1 = new Formula();
f1.read(f.car());
Formula f2 = new Formula();
f2.read(f.cdr());
return (quantifierNotInStatement(f1) || quantifierNotInStatement(f2));
}
Formula form = new Formula();
form.read(f.theFormula);
if (form.car() != null && form.car().length() > 0) { // This test shouldn't be needed.
String rest = form.cdr(); // Quantifier list plus rest of statement
Formula quant = new Formula();
quant.read(rest);
String q = quant.car(); // Now just the quantifier list.
String body = quant.cdr();
quant.read(q);
ArrayList<String> qList =
quant.argumentsToArrayList(0); // Put all the quantified variables into a list.
if (rest.indexOf("exists") != -1 || rest.indexOf("forall") != -1) { // nested quantifiers
Formula restForm = new Formula();
restForm.read(rest);
restForm.read(restForm.cdr());
if (quantifierNotInStatement(restForm)) return true;
}
for (int i = 0; i < qList.size(); i++) {
String var = (String) qList.get(i);
if (body.indexOf(var) == -1) return true;
}
}
return false;
}
/**
* ***************************************************************** Returns a list of terms, each
* of which is an instance of some exhaustively decomposed class but is not an instance of any of
* the subclasses that constitute the exhaustive decomposition. For example, given (instance E A)
* and (partition A B C D), then E is included in the list of terms to be returned if E is not a
* instance of B, C, or D.
*/
public static ArrayList<String> membersNotInAnyPartitionClass(KB kb) {
ArrayList<String> result = new ArrayList<String>();
try {
TreeSet<String> reduce = new TreeSet<String>();
// Use all partition statements and all
// exhaustiveDecomposition statements.
ArrayList<Formula> forms = kb.ask("arg", 0, "partition");
if (forms == null) forms = new ArrayList<Formula>();
ArrayList<Formula> forms2 = kb.ask("arg", 0, "exhaustiveDecomposition");
if (forms2 != null) forms.addAll(forms2);
boolean go = true;
Iterator<Formula> it = forms.iterator();
while (go && it.hasNext()) {
Formula form = it.next();
String parent = form.getArgument(1);
ArrayList<String> partition = form.argumentsToArrayList(2);
List<String> instances = kb.getTermsViaPredicateSubsumption("instance", 2, parent, 1, true);
if ((instances != null) && !instances.isEmpty()) {
boolean isInstanceSubsumed = false;
boolean isNaN = true;
String inst = null;
Iterator<String> it2 = instances.iterator();
while (go && it2.hasNext()) {
isInstanceSubsumed = false;
isNaN = true;
inst = it2.next();
try { // For diagnostics, try to avoid treating numbers as bonafide terms.
double dval = Double.parseDouble(inst);
isNaN = Double.isNaN(dval);
} catch (Exception nex) {
}
if (isNaN) {
Iterator<String> it3 = partition.iterator();
while (it3.hasNext()) {
String pclass = it3.next();
if (kb.isInstanceOf(inst, pclass)) {
isInstanceSubsumed = true;
break;
}
}
if (isInstanceSubsumed) continue;
else reduce.add(inst);
}
if (reduce.size() > 99) go = false;
}
}
}
result.addAll(reduce);
if (result.size() > 99) result.add("limited to 100 results");
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}