context: It is probable that Greg is a swan. There is a very good chance that Mary took the football. Chances are slight that Brian is green.
hypothesis: There is a very good chance that brian is green, or Mary took the football.
valid_hypothesis: There is a very good chance that brian is green, or Mary took the football.
invalid_hypothesis: It is unlikely that brian is green, or Mary took the football.
hypothesis_assertion: Brian is green, or Mary took the football.