context: It is improbable that Greg is a frog. It is probably the case that Mary is in the cinema. We doubt that Bill got the milk there. Chances are about even that if Bill got the milk there, and Greg is a frog, then Lily is a frog. There is almost no chance that if either Mary is in the cinema, or Bill got the milk there, then Winona is a wolf. It is probable that if Bill got the milk there, and Greg is a frog, then Julius is a rhino.
hypothesis: There is almost no chance that lily is a frog, and Bill got the milk there.
valid_hypothesis: There is almost no chance that lily is a frog, and Bill got the milk there.
invalid_hypothesis: We believe that lily is a frog, and Bill got the milk there.
hypothesis_assertion: Lily is a frog, and Bill got the milk there.