context: It is unlikely that John discarded the milk. Chances are slight that Brian is a frog. There is a very good chance that Sandra put down the milk. There is a very good chance that if Sandra put down the milk, or Brian is a frog, then Lily is green. There is a better than even chance that if John discarded the milk, and Sandra put down the milk, then Emily is a sheep. It is unlikely that if either Sandra put down the milk, or Brian is a frog, then Bernhard is a lion.
hypothesis: It is highly unlikely that lily is green, and Sandra put down the milk.
valid_hypothesis: There is a better than even chance that lily is green, and Sandra put down the milk.
invalid_hypothesis: It is highly unlikely that lily is green, and Sandra put down the milk.
hypothesis_assertion: Lily is green, and Sandra put down the milk.