context: It is impossible that Greg is green. It is likely that Brian is green. We believe that Yann is bored.
hypothesis: It is probable that either Greg is green, or Brian is green.
valid_hypothesis: It is probable that either Greg is green, or Brian is green.
invalid_hypothesis: Chances are slight that either Greg is green, or Brian is green.
hypothesis_assertion: Either Greg is green, or Brian is green.