context: It is almost certain that Julius is a rhino. It is probable that Brian is a swan. Chances are about even that Mary dropped the milk.
hypothesis: It is highly unlikely that brian is a swan, and Julius is a rhino.
valid_hypothesis: It is likely that brian is a swan, and Julius is a rhino.
invalid_hypothesis: It is highly unlikely that brian is a swan, and Julius is a rhino.
hypothesis_assertion: Brian is a swan, and Julius is a rhino.