context: There is a very good chance that Lily is a rhino. It is probable that Greg is gray. Chances are about even that Jason is bored. It is impossible that if Lily is a rhino, and Jason is bored, then John dropped the milk. It is likely that if Greg is gray, or Jason is bored, then Sandra got the football. It is impossible that if Jason is bored, and Lily is a rhino, then Brian is a swan.
hypothesis: It is likely that either John dropped the milk, or Greg is gray.
valid_hypothesis: It is likely that either John dropped the milk, or Greg is gray.
invalid_hypothesis: It is improbable that either John dropped the milk, or Greg is gray.
hypothesis_assertion: Either John dropped the milk, or Greg is gray.