context: It is certain that Bernhard is gray. We doubt that Brian is yellow. It is highly likely that Sandra took the football. It is highly unlikely that if either Brian is yellow, or Sandra took the football, then Mary left the apple. There is almost no chance that if Bernhard is gray, or Sandra took the football, then John went to the kitchen. It is unlikely that if Bernhard is gray, and Sandra took the football, then Julius is a lion.
hypothesis: It is highly likely that bernhard is gray, and Sandra took the football.
valid_hypothesis: It is highly likely that bernhard is gray, and Sandra took the football.
invalid_hypothesis: There is almost no chance that bernhard is gray, and Sandra took the football.
hypothesis_assertion: Bernhard is gray, and Sandra took the football.