context: It is certain that Lily is a swan. There is little chance that Brian is a rhino. There is a very good chance that John put down the milk. It is almost certain that if Brian is a rhino, or Lily is a swan, then Sandra left the apple. There is a better than even chance that if either Brian is a rhino, or John put down the milk, then Julius is gray. It is impossible that if Lily is a swan, and John put down the milk, then Mary is in the bedroom.
hypothesis: Chances are about even that either John put down the milk, or Julius is gray.
valid_hypothesis: Chances are about even that either John put down the milk, or Julius is gray.
invalid_hypothesis: It is impossible that either John put down the milk, or Julius is gray.
hypothesis_assertion: Either John put down the milk, or Julius is gray.