context: It is probably not the case that Mary took the apple. It is probable that Brian is a lion. There is a better than even chance that John discarded the milk. It is highly likely that if either Brian is a lion, or John discarded the milk, then Bernhard is yellow. Chances are about even that if either Mary took the apple, or Brian is a lion, then Lily is a rhino. It is highly unlikely that if Brian is a lion, and Mary took the apple, then Daniel grabbed the milk.
hypothesis: It is improbable that either Brian is a lion, or Mary took the apple.
valid_hypothesis: There is a better than even chance that either Brian is a lion, or Mary took the apple.
invalid_hypothesis: It is improbable that either Brian is a lion, or Mary took the apple.
hypothesis_assertion: Either Brian is a lion, or Mary took the apple.