context: A man in a straw hat shades his phone while others walk on a busy sidewalk.
hypothesis: There is a better than even chance that the man is sitting on the sidewalk as others walk by him.
valid_hypothesis: There is a better than even chance that the man is sitting on the sidewalk as others walk by him.
invalid_hypothesis: There is little chance that the man is sitting on the sidewalk as others walk by him.
hypothesis_assertion: The man is sitting on the sidewalk as others walk by him.