context: It is probably the case that Brian is gray. There is almost no chance that Greg is a rhino. Chances are about even that Lily is a lion. We doubt that if Lily is a lion, or Brian is gray, then John went to the bedroom. It is almost certain that if Brian is gray, and Lily is a lion, then Sandra took the football. There is little chance that if Lily is a lion, or Brian is gray, then Bernhard is green.
hypothesis: Chances are slight that brian is gray, or Greg is a rhino.
valid_hypothesis: It is likely that brian is gray, or Greg is a rhino.
invalid_hypothesis: Chances are slight that brian is gray, or Greg is a rhino.
hypothesis_assertion: Brian is gray, or Greg is a rhino.