context: We believe that Bernhard is a swan. It is likely that Greg is a frog. We believe that Julius is gray.
hypothesis: It is certain that either Bernhard is a swan, or Greg is a frog.
valid_hypothesis: Chances are about even that either Bernhard is a swan, or Greg is a frog.
invalid_hypothesis: It is certain that either Bernhard is a swan, or Greg is a frog.
hypothesis_assertion: Either Bernhard is a swan, or Greg is a frog.