context: It is almost certain that Bernhard is a rhino. There is little chance that John dropped the milk. It is probably the case that Brian is a swan.
hypothesis: It is highly unlikely that brian is a swan, and John dropped the milk.
valid_hypothesis: It is highly unlikely that brian is a swan, and John dropped the milk.
invalid_hypothesis: There is a very good chance that brian is a swan, and John dropped the milk.
hypothesis_assertion: Brian is a swan, and John dropped the milk.