context: A man in a gray sweatshirt and blue jeans is pulling on a rope while a guy in a white shirt and black jeans watches him.
hypothesis: It is impossible that the man was trying to pull the bull back into the pin
valid_hypothesis: It is impossible that the man was trying to pull the bull back into the pin
invalid_hypothesis: There is a very good chance that the man was trying to pull the bull back into the pin
hypothesis_assertion: the man was trying to pull the bull back into the pin