context: We believe that Greg is a rhino. Chances are about even that John dropped the milk. It is unlikely that Bernhard is gray.
hypothesis: There is a better than even chance that bernhard is gray, or John dropped the milk.
valid_hypothesis: There is a better than even chance that bernhard is gray, or John dropped the milk.
invalid_hypothesis: It is impossible that bernhard is gray, or John dropped the milk.
hypothesis_assertion: Bernhard is gray, or John dropped the milk.