context: Chances are about even that Sandra left the football. It is almost certain that Brian is gray. Chances are slight that Julie is in the bedroom.
hypothesis: Chances are about even that brian is gray, and Sandra left the football.
valid_hypothesis: Chances are about even that brian is gray, and Sandra left the football.
invalid_hypothesis: It is certain that brian is gray, and Sandra left the football.
hypothesis_assertion: Brian is gray, and Sandra left the football.