context: Chances are slight that John grabbed the apple. Chances are slight that Sandra dropped the milk. There is almost no chance that Brian is a swan.
hypothesis: It is impossible that sandra dropped the milk, and Brian is a swan.
valid_hypothesis: It is impossible that sandra dropped the milk, and Brian is a swan.
invalid_hypothesis: It is almost certain that sandra dropped the milk, and Brian is a swan.
hypothesis_assertion: Sandra dropped the milk, and Brian is a swan.