context: There is almost no chance that Greg is gray. It is probable that John moved to the office. It is improbable that Sandra left the milk.
hypothesis: It is impossible that sandra left the milk, and Greg is gray.
valid_hypothesis: It is impossible that sandra left the milk, and Greg is gray.
invalid_hypothesis: It is probably the case that sandra left the milk, and Greg is gray.
hypothesis_assertion: Sandra left the milk, and Greg is gray.