context: It is probably the case that Brian is green. It is improbable that Greg is a lion. It is almost certain that Fred went to the hallway. Chances are about even that if either Fred went to the hallway, or Brian is green, then Bernhard is a lion. It is impossible that if Brian is green, or Greg is a lion, then Winona is a cat. It is probably the case that if Brian is green, or Greg is a lion, then Mary put down the milk.
hypothesis: It is probably not the case that mary put down the milk, or Brian is green.
valid_hypothesis: It is likely that mary put down the milk, or Brian is green.
invalid_hypothesis: It is probably not the case that mary put down the milk, or Brian is green.
hypothesis_assertion: Mary put down the milk, or Brian is green.