premise: A skateboarder goes down a railing.
hypothesis: A skateboarder goes up the hill.
explanation_1: A skateboarder cannot simultaneously go down and railing and up a hill.
explanation_2: A skateboarder can not be going up the hill if they go down a railing.
explanation_3: A skateboarder cannot be both going up a railing that goes down hill.
premise_logic: exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_railing(x2) & n_skateboarder(x1))
hypothesis_logic: exists e1 x1 x2.(n_hill(x2) & up(e1,x2) & Actor(e1,x1) & v_go(e1) & n_skateboarder(x1))