context: It is improbable that Winona is a sheep. It is probably the case that Julius is a swan. It is certain that Bernhard is white.
hypothesis: It is impossible that either Winona is a sheep, or Julius is a swan.
valid_hypothesis: It is probable that either Winona is a sheep, or Julius is a swan.
invalid_hypothesis: It is impossible that either Winona is a sheep, or Julius is a swan.
hypothesis_assertion: Either Winona is a sheep, or Julius is a swan.