context: It is improbable that Brian is a swan. Chances are slight that Sandra dropped the milk. It is probable that Julius is a rhino.
hypothesis: It is probably not the case that either Julius is a rhino, or Brian is a swan.
valid_hypothesis: It is probably the case that either Julius is a rhino, or Brian is a swan.
invalid_hypothesis: It is probably not the case that either Julius is a rhino, or Brian is a swan.
hypothesis_assertion: Either Julius is a rhino, or Brian is a swan.