Indirect relationship should be true

[silentrob]

I'm trying to use a transitive relation though a isa but it is not working. Is this a bug in my code or approach, outside the scope of the project or perhaps a unimplemented feature, in which case I can try to tackle it perhaps with a little direction.

var ant = domain.Concept.create({id:"ant"}),
  dog = domain.Concept.create({id:"dog"}),
  mammal = domain.Concept.create({id:"mammal"}),
  insect = domain.Concept.create({id:"insect"}),
  smallerThan = domain.Relation.create({id:"smallerThan",isTransitive:true});

  ant.isa(insect);
  dog.isa(mammal);

  insect.smallerThan(mammal);

  // These should both be true
  assert(smallerThan(insect, mammal) === true); // true
  assert(smallerThan(ant, dog) === true); // false