context: There is a better than even chance that Lily is a rhino. It is likely that Fred dropped the milk. There is a very good chance that Brian is a frog.
hypothesis: It is almost certain that brian is a frog, and Lily is a rhino.
valid_hypothesis: Chances are about even that brian is a frog, and Lily is a rhino.
invalid_hypothesis: It is almost certain that brian is a frog, and Lily is a rhino.
hypothesis_assertion: Brian is a frog, and Lily is a rhino.