context: It is probable that Sandra grabbed the milk. We believe that Greg is yellow. It is certain that Julius is white. We believe that if either Julius is white, or Sandra grabbed the milk, then Jessica is a cat. Chances are slight that if Greg is yellow, and Sandra grabbed the milk, then Brian is green. It is likely that if either Julius is white, or Sandra grabbed the milk, then John left the apple.
hypothesis: It is probably not the case that either Jessica is a cat, or Brian is green.
valid_hypothesis: It is probably not the case that either Jessica is a cat, or Brian is green.
invalid_hypothesis: It is certain that either Jessica is a cat, or Brian is green.
hypothesis_assertion: Either Jessica is a cat, or Brian is green.