context: It is almost certain that Lily is a frog. It is almost certain that Sandra got the football. Chances are about even that Julius is a swan.
hypothesis: Chances are about even that either Lily is a frog, or Julius is a swan.
valid_hypothesis: Chances are about even that either Lily is a frog, or Julius is a swan.
invalid_hypothesis: It is impossible that either Lily is a frog, or Julius is a swan.
hypothesis_assertion: Either Lily is a frog, or Julius is a swan.