context: Chances are slight that Brian is a lion. We believe that John went to the office. It is probably not the case that Julius is white. It is likely that if Brian is a lion, or Julius is white, then Mary picked up the milk. It is improbable that if either Julius is white, or John went to the office, then Lily is white. It is certain that if either Julius is white, or John went to the office, then Greg is a frog.
hypothesis: It is probably not the case that mary picked up the milk, or Julius is white.
valid_hypothesis: It is probably not the case that mary picked up the milk, or Julius is white.
invalid_hypothesis: It is certain that mary picked up the milk, or Julius is white.
hypothesis_assertion: Mary picked up the milk, or Julius is white.