context: It is likely that Julie is in the bedroom. It is likely that Greg is a rhino. It is probably the case that Winona is a wolf. There is almost no chance that if either Greg is a rhino, or Julie is in the bedroom, then Sandra left the football. It is highly unlikely that if Greg is a rhino, and Julie is in the bedroom, then Lily is white. Chances are slight that if either Julie is in the bedroom, or Winona is a wolf, then Brian is white.
hypothesis: It is certain that sandra left the football, or Brian is white.
valid_hypothesis: It is highly unlikely that sandra left the football, or Brian is white.
invalid_hypothesis: It is certain that sandra left the football, or Brian is white.
hypothesis_assertion: Sandra left the football, or Brian is white.