context: Chances are about even that Brian is a lion. It is certain that Bernhard is a frog. It is probable that Julius is a swan.
hypothesis: It is likely that bernhard is a frog, and Julius is a swan.
valid_hypothesis: It is likely that bernhard is a frog, and Julius is a swan.
invalid_hypothesis: It is impossible that bernhard is a frog, and Julius is a swan.
hypothesis_assertion: Bernhard is a frog, and Julius is a swan.