context: It is highly unlikely that Greg is white. It is unlikely that Daniel left the football. It is impossible that Brian is green. We doubt that if Brian is green, and Daniel left the football, then Julius is a rhino. It is likely that if either Daniel left the football, or Greg is white, then Mary went to the office. Chances are slight that if Greg is white, and Daniel left the football, then John took the apple.
hypothesis: We believe that either John took the apple, or Daniel left the football.
valid_hypothesis: We doubt that either John took the apple, or Daniel left the football.
invalid_hypothesis: We believe that either John took the apple, or Daniel left the football.
hypothesis_assertion: Either John took the apple, or Daniel left the football.