premise: A guy surfing in a lake or river while a boat is pulling him
hypothesis: That man is on a surfboard.
explanation_1: A guy is a man and if surfing means he is on a surfboard.
explanation_2: A guy is usually a man, and, this man was surfing which implies using a surfboard.
explanation_3: A guy is another term for a man. In order to be surfing, you must be on a surfboard.
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 p1 x1.(n_man(x1) & exists x2.(on(x1,x2) & n_surfboard(x2)))
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 x1.(n_man(x1) & exists x2.(on(x1,x2) & n_surfboard(x2)))