context: There is little chance that Brian is gray. It is probably the case that John left the apple. It is impossible that Yann is tired.
hypothesis: There is a better than even chance that yann is tired, and John left the apple.
valid_hypothesis: It is impossible that yann is tired, and John left the apple.
invalid_hypothesis: There is a better than even chance that yann is tired, and John left the apple.
hypothesis_assertion: Yann is tired, and John left the apple.