context: There is almost no chance that Mary went to the office. There is almost no chance that Daniel got the apple. It is likely that Greg is a swan. Chances are about even that if either Mary went to the office, or Daniel got the apple, then Julius is gray. It is impossible that if either Greg is a swan, or Mary went to the office, then Lily is a frog. We doubt that if either Mary went to the office, or Daniel got the apple, then Sandra took the milk.
hypothesis: It is impossible that mary went to the office, and Daniel got the apple.
valid_hypothesis: It is impossible that mary went to the office, and Daniel got the apple.
invalid_hypothesis: There is a better than even chance that mary went to the office, and Daniel got the apple.
hypothesis_assertion: Mary went to the office, and Daniel got the apple.