context: There is almost no chance that Sandra got the apple. It is likely that Bernhard is gray. We believe that Greg is a swan.
hypothesis: We believe that either Greg is a swan, or Sandra got the apple.
valid_hypothesis: We believe that either Greg is a swan, or Sandra got the apple.
invalid_hypothesis: It is probably not the case that either Greg is a swan, or Sandra got the apple.
hypothesis_assertion: Either Greg is a swan, or Sandra got the apple.