context: It is highly likely that Brian is a swan. Chances are about even that John dropped the milk. It is certain that Lily is yellow.
hypothesis: It is probably not the case that brian is a swan, and Lily is yellow.
valid_hypothesis: It is highly likely that brian is a swan, and Lily is yellow.
invalid_hypothesis: It is probably not the case that brian is a swan, and Lily is yellow.
hypothesis_assertion: Brian is a swan, and Lily is yellow.