context: It is probable that Bernhard is a swan. We doubt that Mary left the apple. It is unlikely that Sandra took the football.
hypothesis: It is highly unlikely that mary left the apple, and Sandra took the football.
valid_hypothesis: It is highly unlikely that mary left the apple, and Sandra took the football.
invalid_hypothesis: There is a very good chance that mary left the apple, and Sandra took the football.
hypothesis_assertion: Mary left the apple, and Sandra took the football.