context: An old man wrapped in a gray cloth sitting against a wall.
hypothesis: It is likely that an old man sits against a wall, watching the people walk by.
valid_hypothesis: It is likely that an old man sits against a wall, watching the people walk by.
invalid_hypothesis: It is highly unlikely that an old man sits against a wall, watching the people walk by.
hypothesis_assertion: An old man sits against a wall, watching the people walk by.