context: It is certain that Brian is gray. It is highly unlikely that John went to the office. It is highly likely that Julius is a rhino. It is highly unlikely that if Brian is gray, or John went to the office, then Lily is a lion. It is highly unlikely that if either John went to the office, or Julius is a rhino, then Mary left the apple. There is almost no chance that if Brian is gray, and John went to the office, then Sandra got the football.
hypothesis: There is a very good chance that either Sandra got the football, or John went to the office.
valid_hypothesis: It is highly unlikely that either Sandra got the football, or John went to the office.
invalid_hypothesis: There is a very good chance that either Sandra got the football, or John went to the office.
hypothesis_assertion: Either Sandra got the football, or John went to the office.