context: It is improbable that Sandra left the milk. We believe that John went to the bedroom. It is likely that Brian is a swan. There is little chance that if John went to the bedroom, and Brian is a swan, then Daniel took the football. It is likely that if either Sandra left the milk, or John went to the bedroom, then Julius is gray. It is highly unlikely that if Sandra left the milk, and Brian is a swan, then Bernhard is a frog.
hypothesis: Chances are slight that either Daniel took the football, or Brian is a swan.
valid_hypothesis: There is a better than even chance that either Daniel took the football, or Brian is a swan.
invalid_hypothesis: Chances are slight that either Daniel took the football, or Brian is a swan.
hypothesis_assertion: Either Daniel took the football, or Brian is a swan.