context: It is probably the case that Brian is a swan. There is little chance that John left the milk. It is certain that Mary moved to the garden.
hypothesis: It is unlikely that brian is a swan, or Mary moved to the garden.
valid_hypothesis: It is certain that brian is a swan, or Mary moved to the garden.
invalid_hypothesis: It is unlikely that brian is a swan, or Mary moved to the garden.
hypothesis_assertion: Brian is a swan, or Mary moved to the garden.