context: There is a better than even chance that Brian is a swan. It is likely that Lily is a frog. It is improbable that Greg is a swan.
hypothesis: It is probable that either Lily is a frog, or Greg is a swan.
valid_hypothesis: It is probable that either Lily is a frog, or Greg is a swan.
invalid_hypothesis: It is impossible that either Lily is a frog, or Greg is a swan.
hypothesis_assertion: Either Lily is a frog, or Greg is a swan.