context: It is impossible that Brian is yellow. It is probable that John left the milk. It is unlikely that Lily is gray.
hypothesis: It is impossible that either Brian is yellow, or John left the milk.
valid_hypothesis: It is probably the case that either Brian is yellow, or John left the milk.
invalid_hypothesis: It is impossible that either Brian is yellow, or John left the milk.
hypothesis_assertion: Either Brian is yellow, or John left the milk.