context: There is almost no chance that Greg is gray. It is improbable that Brian is a rhino. We doubt that Julius is a lion.
hypothesis: It is almost certain that greg is gray, and Brian is a rhino.
valid_hypothesis: It is impossible that greg is gray, and Brian is a rhino.
invalid_hypothesis: It is almost certain that greg is gray, and Brian is a rhino.
hypothesis_assertion: Greg is gray, and Brian is a rhino.