context: Chances are about even that Sandra took the apple. We believe that Greg is a swan. Chances are slight that John moved to the office. We doubt that if Greg is a swan, or John moved to the office, then Bernhard is gray. We believe that if John moved to the office, and Sandra took the apple, then Mary is in the cinema. It is highly likely that if Sandra took the apple, or John moved to the office, then Brian is a lion.
hypothesis: We believe that greg is a swan, or Mary is in the cinema.
valid_hypothesis: We believe that greg is a swan, or Mary is in the cinema.
invalid_hypothesis: It is unlikely that greg is a swan, or Mary is in the cinema.
hypothesis_assertion: Greg is a swan, or Mary is in the cinema.