context: It is probably not the case that Daniel left the football. It is almost certain that Brian is a lion. It is almost certain that John went to the kitchen. It is impossible that if Brian is a lion, and Daniel left the football, then Fred is in the school. It is certain that if either John went to the kitchen, or Brian is a lion, then Sandra dropped the apple. There is little chance that if either John went to the kitchen, or Brian is a lion, then Bernhard is green.
hypothesis: It is highly unlikely that john went to the kitchen, or Brian is a lion.
valid_hypothesis: It is certain that john went to the kitchen, or Brian is a lion.
invalid_hypothesis: It is highly unlikely that john went to the kitchen, or Brian is a lion.
hypothesis_assertion: John went to the kitchen, or Brian is a lion.