context: It is probable that Daniel dropped the apple. We believe that Brian is a swan. It is probably not the case that Sandra got the football.
hypothesis: There is a better than even chance that either Sandra got the football, or Daniel dropped the apple.
valid_hypothesis: There is a better than even chance that either Sandra got the football, or Daniel dropped the apple.
invalid_hypothesis: There is little chance that either Sandra got the football, or Daniel dropped the apple.
hypothesis_assertion: Either Sandra got the football, or Daniel dropped the apple.