premise: A helmeted male airborne on a bike on a dirt road.
hypothesis: The man doing a trick in the air.
explanation_1: Being in the air doesn't mean that he is doing a trick.
explanation_2: Sentence 1 doesn't say that the man is doing a trick.
explanation_3: THE MAN IS NOT A BIRD TO DO TRICK IN THE AIR UNLESS HE RIDES A BIKE
premise_logic: exists s1 x1 x2 x3 x4 x5.(a_topic(x1) & on(x1,x3) & on(x3,x4) & n_road(x4) & of(x4,x5) & n_dirt(x5) & n_bike(x3) & n_airborne(x1) & of(x1,x2) & n_male(x2) & a_helmeted(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 x1 x2 x3 x4.(n_air(x4) & n_man(x1) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & in(x3,x4) & n_trick(x3) & (x1 = x2))