context: It is highly unlikely that Julius is a swan. It is certain that Greg is yellow. It is impossible that John is in the garden.
hypothesis: It is impossible that julius is a swan, and John is in the garden.
valid_hypothesis: It is impossible that julius is a swan, and John is in the garden.
invalid_hypothesis: It is likely that julius is a swan, and John is in the garden.
hypothesis_assertion: Julius is a swan, and John is in the garden.