premise: A man is doing tricks on a skateboard.
hypothesis: Nobody is doing tricks
explanation_1: if a man is doing tricks ,it can't be inferred as not doing tricks.
explanation_2: A man cannot be doing tricks and not doing tricks at the same time.
explanation_3: A man cannot be dong tricks if nobody is doing tricks.
premise_logic: exists e1 x1 x2 x3.(on(e1,x3) & n_skateboard(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_man(x1))
hypothesis_logic: -exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_person(x1))
premise_sim: exists e1 x1 x2 x3.(v_do(e1) & on(e1,x3) & n_trick(x2) & n_skateboard(x3) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1))
hypothesis_sim: all e1 x1 x2.(-v_do(e1) | -n_trick(x2) | -n_person(x1) | -Theme(e1,x2) | -Actor(e1,x1))