premise: A skateboarding youth does a trick on a rail.
hypothesis: A young boy showing his new skateboard tricks to his friends.
explanation_1: The youth is not necessarily a boy and they are not necessarily showing their new skateboard tricks to their friends.
explanation_2: Just because someone is doing skateboarding tricks does not mean they are new skateboard tricks or he is showing his friends.
explanation_3: The trick is not necessarily new and the boy could just be playing alone, instead of showing tricks to his friends.
premise_logic: exists e2 e1 x1 x2 x3.(on(e2,x3) & n_rail(x3) & Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & n_trick(x2) & n_youth(x1) & Actor(e1,x1) & v_skateboard(e1))
hypothesis_logic: exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & to(e1,x5) & n_friend(x5) & of(x5,x1) & n_male(x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x2) & v_show(e1) & n_trick(x3) & of(x3,x4) & n_skateboard(x4) & a_new(s2) & Theme(s2,x3) & of(x3,x1) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
premise_sim: exists e2 e1 x1 x2 x3.(v_skateboard(e1) & v_do(e2) & on(e2,x3) & n_youth(x1) & n_trick(x2) & n_rail(x3) & Theme(e2,x2) & Actor(e2,x1) & Actor(e1,x1))
hypothesis_sim: exists e1 s1 s2 x1 x2 x3 x4 x5.(v_show(e1) & to(e1,x5) & of(x5,x1) & of(x3,x4) & of(x3,x1) & n_trick(x3) & n_skateboard(x4) & n_male(x1) & n_friend(x5) & n_boy(x1) & a_young(s1) & a_topic(x1) & a_new(s2) & Theme(s2,x3) & Theme(s1,x1) & Theme(e1,x3) & Actor(e1,x2) & (x1 = x2))