premise: A surfer is riding a wave in a large body of water.
hypothesis: The surfer is skateboarding.
explanation_1: There's no part of skateboarding that includes riding a wave.
explanation_2: A surfer cannot be skateboarding in a large body of water.
explanation_3: The surfer is either  riding a wave or skateboarding.
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 e1 x1.(n_surfer(x1) & Actor(e1,x1) & v_skateboard(e1))