premise: A man is riding on a surfboard.
hypothesis: The man is in a boat behind a truck.
explanation_1: If a man is riding on a surfboard, he is not likely to also be in a boat.
premise_logic: exists e1 x1 x2.(on(e1,x2) & n_surfboard(x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1))
hypothesis_logic: exists p1 x1.(n_man(x1) & exists x2 x3.(in(x1,x2) & behind(x2,x3) & n_truck(x3) & n_boat(x2)))
premise_sim: exists e1 x1 x2.(v_ride(e1) & on(e1,x2) & n_surfboard(x2) & n_man(x1) & Actor(e1,x1))
hypothesis_sim: exists x1.(n_man(x1) & exists x2 x3.(n_truck(x3) & n_boat(x2) & in(x1,x2) & behind(x2,x3)))