context: It is certain that Emily is a sheep. It is improbable that Brian is green. We doubt that Lily is a frog. It is probable that if either Emily is a sheep, or Brian is green, then Bill went to the garden. Chances are about even that if Lily is a frog, or Emily is a sheep, then Fred is in the bedroom. It is probable that if Brian is green, and Lily is a frog, then Sandra got the milk.
hypothesis: It is unlikely that emily is a sheep, or Sandra got the milk.
valid_hypothesis: It is certain that emily is a sheep, or Sandra got the milk.
invalid_hypothesis: It is unlikely that emily is a sheep, or Sandra got the milk.
hypothesis_assertion: Emily is a sheep, or Sandra got the milk.