context: Young man running towards a tennis court while another is waiting in the other side of the net.
hypothesis: It is probably not the case that a young man is running to grab a tennis ball.
valid_hypothesis: It is probably not the case that a young man is running to grab a tennis ball.
invalid_hypothesis: We believe that a young man is running to grab a tennis ball.
hypothesis_assertion: A young man is running to grab a tennis ball.