premise: A guy surfing in a lake or river while a boat is pulling him
hypothesis: The man is riding a flying surfboard.
explanation_1: A man cannot be surfing in a lake and also flying.
explanation_2: A man cannot be on a flying surfboard and surfing in a lake at the same time. One is in the air and the other is in the water.
explanation_3: If surfing while a boat is pulling him means he is not riding a flying surfboard at the same time.
premise_logic: exists e1 p1 x1 x2.(exists e2 x3.(Theme(e2,x1) & Actor(e2,x3) & v_pull(e2) & n_boat(x3)) & n_male(x1) & while(e1,p1) & in(e1,x2) & (n_lake(x2) | n_river(x2)) & Actor(e1,x1) & v_surfing(e1) & n_guy(x1))
hypothesis_logic: exists e2 e1 x1 x2.(n_man(x1) & Theme(e2,x2) & Actor(e2,x1) & v_ride(e2) & n_surfboard(x2) & Actor(e1,x2) & v_fly(e1))
premise_sim: exists e1 p1 x1 x2.(while(e1,p1) & v_surfing(e1) & n_male(x1) & n_guy(x1) & in(e1,x2) & exists e2 x3.(v_pull(e2) & n_boat(x3) & Theme(e2,x1) & Actor(e2,x3)) & Actor(e1,x1) & (n_river(x2) | n_lake(x2)))
hypothesis_sim: exists e2 e1 x1 x2.(v_ride(e2) & v_fly(e1) & n_surfboard(x2) & n_man(x1) & Theme(e2,x2) & Actor(e2,x1) & Actor(e1,x2))