context: We believe that Brian is a swan. It is likely that Lily is a frog. There is almost no chance that Greg is a rhino.
hypothesis: Chances are about even that either Lily is a frog, or Brian is a swan.
valid_hypothesis: Chances are about even that either Lily is a frog, or Brian is a swan.
invalid_hypothesis: It is almost certain that either Lily is a frog, or Brian is a swan.
hypothesis_assertion: Either Lily is a frog, or Brian is a swan.