context: We believe that Lily is a frog. We doubt that Bill left the milk. There is a very good chance that Brian is yellow.
hypothesis: It is likely that lily is a frog, and Bill left the milk.
valid_hypothesis: Chances are slight that lily is a frog, and Bill left the milk.
invalid_hypothesis: It is likely that lily is a frog, and Bill left the milk.
hypothesis_assertion: Lily is a frog, and Bill left the milk.