@Test
public void testTruthUnknown() {
Predicate bv = new BooleanValue(utils.getVar(0));
Map<ObjectLabel, ThreeValue> tvs = new HashMap<ObjectLabel, ThreeValue>();
tvs.put(utils.getSub(0).getSub(utils.getVar(0)), ThreeValue.UNKNOWN);
FusionEnvironment env = new TestEnvironment(utils.getContext(0), tvs, Variant.SOUND_VARIANT);
assertEquals(ThreeValue.UNKNOWN, bv.getTruth(env, utils.getSub(0)));
}