context: Chances are about even that Daniel left the football. We doubt that Brian is green. It is probably the case that Greg is a swan. It is highly likely that if Greg is a swan, and Daniel left the football, then Mary went to the hallway. There is a very good chance that if Brian is green, and Daniel left the football, then John took the apple. There is almost no chance that if either Greg is a swan, or Daniel left the football, then Julius is green.
hypothesis: It is likely that julius is green, and John took the apple.
valid_hypothesis: It is impossible that julius is green, and John took the apple.
invalid_hypothesis: It is likely that julius is green, and John took the apple.
hypothesis_assertion: Julius is green, and John took the apple.