context: It is improbable that Fred went to the hallway. Chances are slight that John put down the milk. Chances are about even that Lily is gray. We doubt that if Fred went to the hallway, and Lily is gray, then Brian is a frog. It is likely that if Fred went to the hallway, and John put down the milk, then Greg is white. Chances are about even that if either Lily is gray, or John put down the milk, then Sumit is tired.
hypothesis: There is almost no chance that fred went to the hallway, and Sumit is tired.
valid_hypothesis: There is almost no chance that fred went to the hallway, and Sumit is tired.
invalid_hypothesis: It is probably the case that fred went to the hallway, and Sumit is tired.
hypothesis_assertion: Fred went to the hallway, and Sumit is tired.