context: An African-American football player, wearing jersey number 12 for the University of Oklahoma, throws a football to his left.
hypothesis: It is certain that the player throws the baseball to the umpire.
valid_hypothesis: It is impossible that the player throws the baseball to the umpire.
invalid_hypothesis: It is certain that the player throws the baseball to the umpire.
hypothesis_assertion: The player throws the baseball to the umpire.