context: Chances are about even that Brian is a frog. There is little chance that Lily is a swan. There is almost no chance that Bill went to the kitchen.
hypothesis: It is likely that brian is a frog, and Bill went to the kitchen.
valid_hypothesis: There is almost no chance that brian is a frog, and Bill went to the kitchen.
invalid_hypothesis: It is likely that brian is a frog, and Bill went to the kitchen.
hypothesis_assertion: Brian is a frog, and Bill went to the kitchen.