context: It is impossible that Yann is tired. There is a very good chance that Brian is gray. It is highly unlikely that Sandra grabbed the apple.
hypothesis: There is a very good chance that yann is tired, or Brian is gray.
valid_hypothesis: There is a very good chance that yann is tired, or Brian is gray.
invalid_hypothesis: It is impossible that yann is tired, or Brian is gray.
hypothesis_assertion: Yann is tired, or Brian is gray.