context: We believe that Brian is a swan. It is almost certain that John put down the apple. Chances are slight that Sandra grabbed the milk. It is highly unlikely that if Brian is a swan, or Sandra grabbed the milk, then Winona is a mouse. There is a very good chance that if either John put down the apple, or Brian is a swan, then Julius is gray. There is almost no chance that if Brian is a swan, and John put down the apple, then Lily is a rhino.
hypothesis: It is almost certain that winona is a mouse, and Julius is gray.
valid_hypothesis: It is impossible that winona is a mouse, and Julius is gray.
invalid_hypothesis: It is almost certain that winona is a mouse, and Julius is gray.
hypothesis_assertion: Winona is a mouse, and Julius is gray.