premise: Two people are surfing on a large wave in the ocean.
hypothesis: The people are water skiing.
explanation_1: Water skiing and surfing are two different activities, so can not be performed simultaneously.
premise_logic: exists e1 s1 x1 x2 x3.(n_ocean(x3) & on(e1,x2) & in(x2,x3) & n_wave(x2) & a_large(s1) & Theme(s1,x2) & Actor(e1,x1) & v_surf(e1) & n_people(x1) & card_eq_2(x1))
hypothesis_logic: exists p1 x1.(n_people(x1) & exists x2 x3.((x1 = x2) & n_skiing(x2) & of(x2,x3) & n_water(x3)))
premise_sim: exists e1 s1 x1 x2 x3.(v_surf(e1) & on(e1,x2) & n_wave(x2) & n_people(x1) & n_ocean(x3) & in(x2,x3) & card_eq_2(x1) & a_large(s1) & Theme(s1,x2) & Actor(e1,x1))
hypothesis_sim: exists x1.(n_people(x1) & exists x2 x3.(of(x2,x3) & n_water(x3) & n_skiing(x2) & (x1 = x2)))