context: It is almost certain that John went to the hallway. Chances are about even that Lily is green. It is impossible that Brian is a frog. We doubt that if either Lily is green, or John went to the hallway, then Jessica is a mouse. It is highly likely that if Lily is green, and John went to the hallway, then Bernhard is a swan. It is highly likely that if either Lily is green, or Brian is a frog, then Sandra took the football.
hypothesis: It is almost certain that either John went to the hallway, or Brian is a frog.
valid_hypothesis: It is almost certain that either John went to the hallway, or Brian is a frog.
invalid_hypothesis: It is unlikely that either John went to the hallway, or Brian is a frog.
hypothesis_assertion: Either John went to the hallway, or Brian is a frog.