context: It is almost certain that Julius is a swan. It is highly likely that Brian is a rhino. It is likely that John dropped the apple.
hypothesis: It is likely that either Brian is a rhino, or John dropped the apple.
valid_hypothesis: It is probably not the case that either Brian is a rhino, or John dropped the apple.
invalid_hypothesis: It is likely that either Brian is a rhino, or John dropped the apple.
hypothesis_assertion: Either Brian is a rhino, or John dropped the apple.