context: It is highly unlikely that Sandra took the football. Chances are slight that Greg is gray. It is unlikely that Brian is green. There is almost no chance that if Greg is gray, or Sandra took the football, then Mary went to the garden. It is likely that if Sandra took the football, and Brian is green, then Bill is in the school. It is probably the case that if Brian is green, or Greg is gray, then Jason is hungry.
hypothesis: There is a very good chance that either Sandra took the football, or Brian is green.
valid_hypothesis: It is probably not the case that either Sandra took the football, or Brian is green.
invalid_hypothesis: There is a very good chance that either Sandra took the football, or Brian is green.
hypothesis_assertion: Either Sandra took the football, or Brian is green.