static L<TripleRef<Symbol>> ai_tripleRefs(Symbol a, Symbol b, Symbol c) {
  ret ai_filterTripleRefs(a, b, c, ai_thoughtSpace_query(a, b, c, thoughtSpace()));
}

static L<TripleRef<Symbol>> ai_triples(Symbol a, Symbol b, Symbol c, AbstractThoughtSpace ts) {
  ret ai_filterTripleRefs(a, b, c, ai_thoughtSpace_query(a, b, c, ts));
}