context: It is highly unlikely that Winona is a mouse. It is improbable that Julius is gray. There is a better than even chance that Fred went to the kitchen. It is almost certain that if either Fred went to the kitchen, or Julius is gray, then Brian is gray. It is probably the case that if either Winona is a mouse, or Fred went to the kitchen, then Mary took the milk. There is little chance that if Julius is gray, and Fred went to the kitchen, then Sandra left the milk.
hypothesis: It is improbable that fred went to the kitchen, or Sandra left the milk.
valid_hypothesis: There is a better than even chance that fred went to the kitchen, or Sandra left the milk.
invalid_hypothesis: It is improbable that fred went to the kitchen, or Sandra left the milk.
hypothesis_assertion: Fred went to the kitchen, or Sandra left the milk.