premise: A man dives into a river.
hypothesis: The man is fishing by the river.
explanation_1: One can not be fishing by and dive into simultaneously.
premise_logic: exists e1 x1 x2.(into(e1,x2) & n_river(x2) & Actor(e1,x1) & v_dive(e1) & n_man(x1))
hypothesis_logic: exists p1 x1 x3.(n_river(x3) & n_man(x1) & exists x2.((x1 = x2) & by(x2,x3) & n_fishing(x2)))
premise_sim: exists e1 x1 x2.(v_dive(e1) & n_river(x2) & n_man(x1) & into(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists x1 x3.(n_river(x3) & n_man(x1) & exists x2.(n_fishing(x2) & by(x2,x3) & (x1 = x2)))