context: It is improbable that Greg is yellow. There is a very good chance that Fred is in the park. There is little chance that Gertrude is a cat. It is almost certain that if either Fred is in the park, or Greg is yellow, then Mary moved to the office. There is little chance that if Fred is in the park, or Greg is yellow, then Lily is a lion. There is almost no chance that if Greg is yellow, and Gertrude is a cat, then Brian is gray.
hypothesis: It is improbable that either Brian is gray, or Fred is in the park.
valid_hypothesis: There is a very good chance that either Brian is gray, or Fred is in the park.
invalid_hypothesis: It is improbable that either Brian is gray, or Fred is in the park.
hypothesis_assertion: Either Brian is gray, or Fred is in the park.