premise: a snowboarder wearing a green hat is riding along a metal railing.
hypothesis: A snowboarder in a green hat rides along a metal railing in a competition.
explanation_1: Riding rails is not always for a competition, and that was never implied in the first sentence.
explanation_2: A snowboarder riding a railing does not necessarily imply that he is in a competition.
explanation_3: The snowboarder may not necessarily be riding along the railing in any sort of competition.
premise_logic: exists e2 e1 s1 x1 x2 x3 x4 x5.(along(e2,x4) & n_railing(x4) & of(x4,x5) & n_metal(x5) & Actor(e2,x1) & v_ride(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_hat(x3) & a_green(s1) & Theme(s1,x3) & (x1 = x2) & n_snowboarder(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x2) & in(e1,x6) & n_competition(x6) & Actor(e1,x5) & v_rail(e1) & (x2 = x5) & along(x2,x4) & n_metal(x4) & n_ride(x2) & of(x2,x3) & n_hat(x3) & a_green(s1) & Theme(s1,x2) & n_snowboarder(x1))
premise_sim: exists e2 e1 s1 x1 x2 x3 x4 x5.(v_wear(e1) & v_ride(e2) & of(x4,x5) & n_snowboarder(x1) & n_railing(x4) & n_metal(x5) & n_hat(x3) & along(e2,x4) & a_green(s1) & Theme(s1,x3) & Theme(e1,x3) & Actor(e2,x1) & Actor(e1,x2) & (x1 = x2))
hypothesis_sim: exists e1 s1 x1 x2 x3 x4 x5 x6.(v_rail(e1) & of(x2,x3) & n_snowboarder(x1) & n_ride(x2) & n_metal(x4) & n_hat(x3) & n_competition(x6) & in(x1,x2) & in(e1,x6) & along(x2,x4) & a_topic(x1) & a_green(s1) & Theme(s1,x2) & Actor(e1,x5) & (x2 = x5))