context: There is little chance that John dropped the milk. It is certain that Brian is a swan. It is impossible that Sandra got the apple.
hypothesis: Chances are slight that either Sandra got the apple, or John dropped the milk.
valid_hypothesis: Chances are slight that either Sandra got the apple, or John dropped the milk.
invalid_hypothesis: There is a very good chance that either Sandra got the apple, or John dropped the milk.
hypothesis_assertion: Either Sandra got the apple, or John dropped the milk.