context: There is little chance that Mary moved to the office. It is impossible that Bernhard is gray. Chances are slight that Fred went to the garden. Chances are about even that if either Bernhard is gray, or Mary moved to the office, then Brian is gray. It is certain that if Bernhard is gray, or Fred went to the garden, then Sandra got the milk. Chances are slight that if Fred went to the garden, or Mary moved to the office, then Greg is a frog.
hypothesis: There is little chance that either Brian is gray, or Sandra got the milk.
valid_hypothesis: There is little chance that either Brian is gray, or Sandra got the milk.
invalid_hypothesis: It is probable that either Brian is gray, or Sandra got the milk.
hypothesis_assertion: Either Brian is gray, or Sandra got the milk.