premise: A surfer is riding a wave in a large body of water.
hypothesis: This is his first wave of the day.
explanation_1: The surfer could be riding later waves and not the first wave.
explanation_2: We don't know if it's the surfers first wave, last wave, or any number in between.
explanation_3: Riding a wave isn't necessarily the first wave.
premise_logic: exists e1 s1 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_water(x4) & n_body(x3) & a_large(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_wave(x2) & n_surfer(x1))
hypothesis_logic: exists p1 s1 x1 x2 x3.(n_day(x3) & n_wave(x2) & a_first(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & n_thing(x1) & (x1 = x2) & of(x2,x3))
premise_sim: exists e1 s1 x1 x2 x3 x4.(v_ride(e1) & of(x3,x4) & n_wave(x2) & n_water(x4) & n_surfer(x1) & n_body(x3) & in(e1,x3) & a_large(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists s1 x1 x2 x3.(of(x2,x3) & of(x2,x1) & n_wave(x2) & n_thing(x1) & n_male(x1) & n_day(x3) & a_first(s1) & Theme(s1,x2) & (x1 = x2))