context: Chances are slight that Bernhard is a lion. It is unlikely that Greg is yellow. It is impossible that Julius is a swan. It is probably the case that if Greg is yellow, and Julius is a swan, then Sandra left the milk. It is impossible that if Bernhard is a lion, and Julius is a swan, then John moved to the garden. It is likely that if Greg is yellow, and Julius is a swan, then Mary is in the cinema.
hypothesis: It is impossible that julius is a swan, and John moved to the garden.
valid_hypothesis: It is impossible that julius is a swan, and John moved to the garden.
invalid_hypothesis: It is likely that julius is a swan, and John moved to the garden.
hypothesis_assertion: Julius is a swan, and John moved to the garden.