premise: a lone surfboarder on a white surfboard flying through the air over a wave
hypothesis: A lone surfboarder is practicing for an upcoming competition.
explanation_1: Surfing is a hobby, not all surfers are practicing for a competition.
explanation_2: Not all surfers are practicing for an upcoming competition.
explanation_3: the surfboarder does not necessarily have to be practicing for an upcoming competition. he could be surfing for fun
premise_logic: exists e1 s1 s2 x1 x2 x3 x4 x5.(n_air(x4) & a_topic(x1) & on(x1,x2) & over(e1,x5) & n_wave(x5) & through(e1,x4) & Actor(e1,x3) & v_fly(e1) & (x2 = x3) & n_surfboard(x2) & a_white(s2) & Theme(s2,x2) & n_surfboarder(x1) & a_lone(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 s1 s2 x1 x2.(for(e1,x2) & n_competition(x2) & a_upcoming(s2) & Theme(s2,x2) & Actor(e1,x1) & v_practice(e1) & n_surfboarder(x1) & a_lone(s1) & Theme(s1,x1))