context: It is highly likely that Bill dropped the milk. We believe that John took the apple. It is highly likely that Brian is gray. We doubt that if Brian is gray, and John took the apple, then Julius is a rhino. It is improbable that if Bill dropped the milk, or John took the apple, then Greg is a swan. There is almost no chance that if John took the apple, and Bill dropped the milk, then Lily is white.
hypothesis: We doubt that brian is gray, and Bill dropped the milk.
valid_hypothesis: There is a very good chance that brian is gray, and Bill dropped the milk.
invalid_hypothesis: We doubt that brian is gray, and Bill dropped the milk.
hypothesis_assertion: Brian is gray, and Bill dropped the milk.