context: Chances are about even that John dropped the milk. We doubt that Bernhard is a frog. It is probable that Brian is gray.
hypothesis: Chances are slight that bernhard is a frog, and Brian is gray.
valid_hypothesis: Chances are slight that bernhard is a frog, and Brian is gray.
invalid_hypothesis: It is probably the case that bernhard is a frog, and Brian is gray.
hypothesis_assertion: Bernhard is a frog, and Brian is gray.