context: It is probably not the case that Mary put down the milk. Chances are about even that Greg is yellow. It is impossible that Bernhard is green. There is little chance that if Mary put down the milk, and Greg is yellow, then Brian is gray. It is probably not the case that if Greg is yellow, and Bernhard is green, then Lily is a swan. It is probably not the case that if Mary put down the milk, or Greg is yellow, then John went to the hallway.
hypothesis: Chances are about even that greg is yellow, or Brian is gray.
valid_hypothesis: Chances are about even that greg is yellow, or Brian is gray.
invalid_hypothesis: It is impossible that greg is yellow, or Brian is gray.
hypothesis_assertion: Greg is yellow, or Brian is gray.