context: It is certain that Bill put down the milk. It is unlikely that Sandra got the football. It is highly unlikely that Brian is gray. It is probable that if Brian is gray, or Sandra got the football, then Winona is a mouse. There is a better than even chance that if Bill put down the milk, or Brian is gray, then Greg is white. It is almost certain that if Bill put down the milk, or Brian is gray, then John picked up the apple.
hypothesis: Chances are slight that brian is gray, or Bill put down the milk.
valid_hypothesis: It is certain that brian is gray, or Bill put down the milk.
invalid_hypothesis: Chances are slight that brian is gray, or Bill put down the milk.
hypothesis_assertion: Brian is gray, or Bill put down the milk.