context: We doubt that Greg is gray. We doubt that John picked up the milk. We doubt that Gertrude is a cat.
hypothesis: It is highly unlikely that gertrude is a cat, and Greg is gray.
valid_hypothesis: It is highly unlikely that gertrude is a cat, and Greg is gray.
invalid_hypothesis: It is probably the case that gertrude is a cat, and Greg is gray.
hypothesis_assertion: Gertrude is a cat, and Greg is gray.