premise: A man riding a red motorbike near a large crowd of people by some tents.
hypothesis: A man is on a skateboard.
explanation_1: The man cannot be on a skateboard and a motorbike simultaneously
explanation_2: One cannot ride a red motorbike while standing on a skateboard.
explanation_3: A man is riding either a motorbike or a skateboard he can't be riding both.
premise_logic: exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & near(x3,x4) & by(x4,x6) & n_tent(x6) & of(x4,x5) & n_people(x5) & n_crowd(x4) & a_large(s2) & Theme(s2,x4) & n_motorbike(x3) & a_red(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
hypothesis_logic: exists p1 x1.(exists x2.(on(x1,x2) & n_skateboard(x2)) & n_man(x1))