context: It is impossible that Bill discarded the milk. Chances are slight that Greg is a swan. There is little chance that Bernhard is a frog.
hypothesis: It is probable that bernhard is a frog, or Greg is a swan.
valid_hypothesis: We doubt that bernhard is a frog, or Greg is a swan.
invalid_hypothesis: It is probable that bernhard is a frog, or Greg is a swan.
hypothesis_assertion: Bernhard is a frog, or Greg is a swan.