premise: A man jumps onto a skateboard that is sitting on a folding chair.
hypothesis: The man is taking a swim.
explanation_1: The man can't jump onto a skateboard and be swimming.
explanation_2: If a man jumps onto a skateboard he is not taking a swim.
explanation_3: man can't be taking a swim if he jumps onto skateboard
premise_logic: exists e2 e1 s1 x1 x2 x3 x4.(onto(e1,x2) & on(e2,x4) & n_chair(x4) & a_folding(s1) & Theme(s1,x4) & Actor(e2,x3) & v_sit(e2) & (x2 = x3) & n_skateboard(x2) & Actor(e1,x1) & v_jump(e1) & n_man(x1))
hypothesis_logic: exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_swim(x2))
premise_sim: exists e2 e1 s1 x1 x2 x3 x4.(v_sit(e2) & v_jump(e1) & onto(e1,x2) & on(e2,x4) & n_skateboard(x2) & n_man(x1) & n_chair(x4) & a_folding(s1) & Theme(s1,x4) & Actor(e2,x3) & Actor(e1,x1) & (x2 = x3))
hypothesis_sim: exists e1 x1 x2.(v_take(e1) & n_swim(x2) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1))