context: It is almost certain that Brian is green. There is little chance that Bernhard is a swan. It is probable that Mary got the football. We believe that if Bernhard is a swan, or Mary got the football, then Yann is thirsty. Chances are slight that if Brian is green, and Bernhard is a swan, then Greg is a rhino. Chances are about even that if either Bernhard is a swan, or Mary got the football, then John picked up the apple.
hypothesis: There is little chance that john picked up the apple, or Yann is thirsty.
valid_hypothesis: There is a better than even chance that john picked up the apple, or Yann is thirsty.
invalid_hypothesis: There is little chance that john picked up the apple, or Yann is thirsty.
hypothesis_assertion: John picked up the apple, or Yann is thirsty.