context: It is impossible that Emily is a mouse. Chances are slight that John put down the milk. It is almost certain that Julius is white. It is almost certain that if either Julius is white, or Emily is a mouse, then Brian is a swan. It is highly unlikely that if either Emily is a mouse, or Julius is white, then Bernhard is gray. Chances are about even that if Emily is a mouse, and Julius is white, then Mary moved to the garden.
hypothesis: It is highly unlikely that bernhard is gray, and Julius is white.
valid_hypothesis: It is highly unlikely that bernhard is gray, and Julius is white.
invalid_hypothesis: We believe that bernhard is gray, and Julius is white.
hypothesis_assertion: Bernhard is gray, and Julius is white.