context: It is probably not the case that Sandra left the football. It is almost certain that Greg is white. It is unlikely that Brian is gray. It is highly likely that if either Sandra left the football, or Brian is gray, then Julius is gray. Chances are about even that if Greg is white, or Sandra left the football, then Mary went to the bedroom. It is impossible that if Greg is white, and Brian is gray, then John picked up the apple.
hypothesis: It is certain that either Mary went to the bedroom, or Greg is white.
valid_hypothesis: Chances are about even that either Mary went to the bedroom, or Greg is white.
invalid_hypothesis: It is certain that either Mary went to the bedroom, or Greg is white.
hypothesis_assertion: Either Mary went to the bedroom, or Greg is white.