context: It is impossible that Julius is a rhino. We doubt that Yann is tired. It is almost certain that Greg is gray. There is little chance that if Julius is a rhino, or Yann is tired, then Antoine is thirsty. There is a better than even chance that if Julius is a rhino, or Yann is tired, then John went to the garden. It is impossible that if Greg is gray, and Yann is tired, then Brian is a swan.
hypothesis: It is improbable that either John went to the garden, or Brian is a swan.
valid_hypothesis: It is improbable that either John went to the garden, or Brian is a swan.
invalid_hypothesis: It is likely that either John went to the garden, or Brian is a swan.
hypothesis_assertion: Either John went to the garden, or Brian is a swan.