context: It is certain that Greg is gray. It is impossible that Bernhard is yellow. It is likely that John dropped the milk.
hypothesis: It is certain that greg is gray, or John dropped the milk.
valid_hypothesis: It is certain that greg is gray, or John dropped the milk.
invalid_hypothesis: It is improbable that greg is gray, or John dropped the milk.
hypothesis_assertion: Greg is gray, or John dropped the milk.