premise: A BMX biker is in the air completing a trick with only one foot on the pedals.
hypothesis: He is in a competition.
explanation_1: Just because a BMX biker is in the air completing a trick it does not mean he is in a competition.  A BMX biker does not have to be a he.
premise_logic: exists p1 x1 x2 x3 x7.(n_pedal(x7) & n_air(x3) & exists e1 x4 x5 x6.(in(x1,x3) & Theme(e1,x5) & Actor(e1,x4) & v_complete(e1) & with(x5,x6) & on(x6,x7) & n_foot(x6) & card_eq_1(x6) & r_only(x6) & n_trick(x5) & (x3 = x4)) & n_biker(x1) & (x1 = x2) & ne_org_bmx(x2))
hypothesis_logic: exists p1 x1.(n_male(x1) & exists x2.(in(x1,x2) & n_competition(x2)))
premise_sim: exists x1 x2 x3 x7.(ne_org_bmx(x2) & n_pedal(x7) & n_biker(x1) & n_air(x3) & exists e1 x4 x5 x6.(with(x5,x6) & v_complete(e1) & r_only(x6) & on(x6,x7) & n_trick(x5) & n_foot(x6) & in(x1,x3) & card_eq_1(x6) & Theme(e1,x5) & Actor(e1,x4) & (x3 = x4)) & (x1 = x2))
hypothesis_sim: exists x1.(n_male(x1) & exists x2.(n_competition(x2) & in(x1,x2)))