context: It is probably not the case that Brian is a rhino. We doubt that Daniel left the football. There is almost no chance that Julius is a lion. It is probably not the case that if Brian is a rhino, and Julius is a lion, then Mary got the apple. Chances are about even that if Brian is a rhino, or Julius is a lion, then John went to the office. It is highly likely that if Brian is a rhino, or Daniel left the football, then Greg is green.
hypothesis: It is impossible that brian is a rhino, or Daniel left the football.
valid_hypothesis: Chances are about even that brian is a rhino, or Daniel left the football.
invalid_hypothesis: It is impossible that brian is a rhino, or Daniel left the football.
hypothesis_assertion: Brian is a rhino, or Daniel left the football.