context: It is probably not the case that Jeff went to the office. It is impossible that Bernhard is gray. There is almost no chance that Sandra dropped the milk.
hypothesis: It is impossible that bernhard is gray, and Sandra dropped the milk.
valid_hypothesis: It is impossible that bernhard is gray, and Sandra dropped the milk.
invalid_hypothesis: It is certain that bernhard is gray, and Sandra dropped the milk.
hypothesis_assertion: Bernhard is gray, and Sandra dropped the milk.