context: Chances are about even that Brian is a rhino. It is probably not the case that Sandra left the apple. It is unlikely that Julius is gray. It is almost certain that if Julius is gray, or Sandra left the apple, then Jessica is a mouse. It is probable that if either Julius is gray, or Brian is a rhino, then Greg is a frog. Chances are about even that if either Sandra left the apple, or Brian is a rhino, then John grabbed the milk.
hypothesis: Chances are slight that brian is a rhino, and Sandra left the apple.
valid_hypothesis: Chances are slight that brian is a rhino, and Sandra left the apple.
invalid_hypothesis: We believe that brian is a rhino, and Sandra left the apple.
hypothesis_assertion: Brian is a rhino, and Sandra left the apple.