context: We doubt that Lily is a rhino. There is a better than even chance that Brian is a swan. There is a very good chance that Julius is gray. It is likely that if Julius is gray, or Brian is a swan, then Fred is in the kitchen. Chances are about even that if Brian is a swan, or Julius is gray, then John went to the garden. It is probably the case that if Brian is a swan, and Lily is a rhino, then Greg is a frog.
hypothesis: It is probable that lily is a rhino, and Fred is in the kitchen.
valid_hypothesis: It is improbable that lily is a rhino, and Fred is in the kitchen.
invalid_hypothesis: It is probable that lily is a rhino, and Fred is in the kitchen.
hypothesis_assertion: Lily is a rhino, and Fred is in the kitchen.