context: A man wearing a black beret, black coat, and black gloves takes a picture in the middle of a crowd
hypothesis: There is a very good chance that a man in black takes a picture of a fountain.
valid_hypothesis: It is impossible that a man in black takes a picture of a fountain.
invalid_hypothesis: There is a very good chance that a man in black takes a picture of a fountain.
hypothesis_assertion: A man in black takes a picture of a fountain.