premise: A surfer on a wave.
hypothesis: A surfer competing at a competition.
explanation_1: A surfer on a wave can be surfing for fun instead of competing at a competition.
explanation_2: We don't know if the surfer is competing in a competition.
explanation_3: Surfer on a wave isn't necessarily competing at a competition.
premise_logic: exists x1 x2.(a_topic(x1) & on(x1,x2) & n_wave(x2) & n_surfer(x1))
hypothesis_logic: exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_competition(x3) & Actor(e1,x2) & v_compete(e1) & (x1 = x2) & n_surfer(x1))
premise_sim: exists x1 x2.(on(x1,x2) & n_wave(x2) & n_surfer(x1) & a_topic(x1))
hypothesis_sim: exists e1 x1 x2 x3.(v_compete(e1) & n_surfer(x1) & n_competition(x3) & at(e1,x3) & a_topic(x1) & Actor(e1,x2) & (x1 = x2))