context: It is probably the case that Julius is a swan. It is likely that Mary went to the kitchen. It is certain that Brian is gray. It is impossible that if Julius is a swan, and Brian is gray, then Daniel left the football. There is a very good chance that if either Brian is gray, or Mary went to the kitchen, then Greg is a swan. There is almost no chance that if Mary went to the kitchen, or Julius is a swan, then Lily is a lion.
hypothesis: It is certain that either Daniel left the football, or Greg is a swan.
valid_hypothesis: It is probably not the case that either Daniel left the football, or Greg is a swan.
invalid_hypothesis: It is certain that either Daniel left the football, or Greg is a swan.
hypothesis_assertion: Either Daniel left the football, or Greg is a swan.