context: An old man is sitting down in the street.
hypothesis: It is almost certain that the old man needs to rest because he is tired from his long journey.
valid_hypothesis: It is impossible that the old man needs to rest because he is tired from his long journey.
invalid_hypothesis: It is almost certain that the old man needs to rest because he is tired from his long journey.
hypothesis_assertion: The old man needs to rest because he is tired from his long journey.