context: It is highly likely that Brian is a swan. It is probably not the case that Jeff went to the garden. It is probably the case that Sandra left the football.
hypothesis: It is probable that brian is a swan, and Jeff went to the garden.
valid_hypothesis: It is unlikely that brian is a swan, and Jeff went to the garden.
invalid_hypothesis: It is probable that brian is a swan, and Jeff went to the garden.
hypothesis_assertion: Brian is a swan, and Jeff went to the garden.