context: It is impossible that Bernhard is a swan. It is certain that Greg is gray. It is highly likely that Sandra dropped the apple.
hypothesis: It is improbable that sandra dropped the apple, and Greg is gray.
valid_hypothesis: It is highly likely that sandra dropped the apple, and Greg is gray.
invalid_hypothesis: It is improbable that sandra dropped the apple, and Greg is gray.
hypothesis_assertion: Sandra dropped the apple, and Greg is gray.