context: A horse and rider are in midair as they leap over an obstacle in a wooded area with another photographer snapping pictures.
hypothesis: It is probably not the case that a person is riding a show horse for a competition.
valid_hypothesis: It is probably not the case that a person is riding a show horse for a competition.
invalid_hypothesis: We believe that a person is riding a show horse for a competition.
hypothesis_assertion: A person is riding a show horse for a competition.