context: It is likely that Mary got the milk. It is almost certain that John picked up the apple. It is probably not the case that Brian is a swan. There is a better than even chance that if Mary got the milk, or Brian is a swan, then Fred is in the kitchen. It is probable that if Brian is a swan, and Mary got the milk, then Julius is green. It is highly unlikely that if either John picked up the apple, or Mary got the milk, then Bernhard is white.
hypothesis: It is probable that either Mary got the milk, or Fred is in the kitchen.
valid_hypothesis: It is probably not the case that either Mary got the milk, or Fred is in the kitchen.
invalid_hypothesis: It is probable that either Mary got the milk, or Fred is in the kitchen.
hypothesis_assertion: Either Mary got the milk, or Fred is in the kitchen.