context: We doubt that Sandra dropped the apple. It is likely that Greg is gray. It is improbable that Brian is white.
hypothesis: It is probable that either Sandra dropped the apple, or Brian is white.
valid_hypothesis: It is probably not the case that either Sandra dropped the apple, or Brian is white.
invalid_hypothesis: It is probable that either Sandra dropped the apple, or Brian is white.
hypothesis_assertion: Either Sandra dropped the apple, or Brian is white.