premise: A guy on a waterskiing board is doing a stunt.
hypothesis: The guy is a pro waterskiier.
explanation_1: WE have no idea if he is a pro waterskiier or not, he could just be doing it for fun.
explanation_2: Doing a stunt does not necessarily mean the guy is a pro waterskiier
explanation_3: Just because doing a stunt does not mean he is a pro.
premise_logic: exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_do(e1) & n_stunt(x4) & on(x1,x2) & n_board(x2) & of(x2,x3) & n_waterskiing(x3) & n_guy(x1))
hypothesis_logic: exists p1 x1.(n_guy(x1) & exists s1 x2.((x1 = x2) & n_waterskiier(x2) & a_pro(s1) & Theme(s1,x2)))
premise_sim: exists e1 x1 x2 x3 x4.(v_do(e1) & on(x1,x2) & of(x2,x3) & n_waterskiing(x3) & n_stunt(x4) & n_guy(x1) & n_board(x2) & Theme(e1,x4) & Actor(e1,x1))
hypothesis_sim: exists x1.(n_guy(x1) & exists s1 x2.(n_waterskiier(x2) & a_pro(s1) & Theme(s1,x2) & (x1 = x2)))