context: Chances are slight that Sandra left the football. It is almost certain that Julius is a swan. It is highly unlikely that Greg is yellow. It is almost certain that if Greg is yellow, or Julius is a swan, then Bill moved to the office. It is probable that if Sandra left the football, or Julius is a swan, then John went to the hallway. Chances are slight that if Julius is a swan, or Sandra left the football, then Mary got the apple.
hypothesis: It is improbable that julius is a swan, and Mary got the apple.
valid_hypothesis: It is improbable that julius is a swan, and Mary got the apple.
invalid_hypothesis: It is probably the case that julius is a swan, and Mary got the apple.
hypothesis_assertion: Julius is a swan, and Mary got the apple.