context: It is improbable that Brian is gray. It is likely that Bernhard is green. There is almost no chance that Sandra left the football.
hypothesis: It is almost certain that brian is gray, and Sandra left the football.
valid_hypothesis: It is impossible that brian is gray, and Sandra left the football.
invalid_hypothesis: It is almost certain that brian is gray, and Sandra left the football.
hypothesis_assertion: Brian is gray, and Sandra left the football.