context: Chances are about even that John left the football. It is probably not the case that Brian is a swan. There is little chance that Daniel took the football. It is impossible that if either Brian is a swan, or Daniel took the football, then Julius is a rhino. It is probable that if John left the football, or Brian is a swan, then Lily is white. It is almost certain that if Brian is a swan, or John left the football, then Mary is in the bedroom.
hypothesis: It is probably not the case that either Mary is in the bedroom, or Brian is a swan.
valid_hypothesis: It is probably not the case that either Mary is in the bedroom, or Brian is a swan.
invalid_hypothesis: It is highly likely that either Mary is in the bedroom, or Brian is a swan.
hypothesis_assertion: Either Mary is in the bedroom, or Brian is a swan.