premise: A man stands speaking to a crowd of sitting people, all wearing business attire.
hypothesis: A boy is riding a wave on his surfboard.
explanation_1: The man is older than a boy.
explanation_2: Standing, speaking and riding a wave are different things.
explanation_3: A boy is is different from a man , and while the boy is riding a wave on his surfboard the man is  speaking to a crowd of sitting people.
premise_logic: exists e1 p1 x1.(exists e2 s1 x2 x3 x4.(to(s1,x2) & all e3 x6 x5.((n_attire(x5) & of(x5,x6) & n_business(x6) & Actor(e3,x5) & v_wear(e3)) -> subset_of(x5,x2)) & subset_of(x3,x2) & of(x3,x4) & n_people(x4) & Actor(e2,x4) & v_sit(e2) & n_crowd(x3) & Theme(s1,x1) & a_speaking(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
hypothesis_logic: exists e1 x1 x2 x3.(on(e1,x3) & n_surfboard(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_wave(x2) & n_boy(x1))
premise_sim: exists e1 p1 x1.(v_stand(e1) & n_man(x1) & exists e2 s1 x2 x3 x4.(v_sit(e2) & to(s1,x2) & subset_of(x3,x2) & of(x3,x4) & n_people(x4) & n_crowd(x3) & all e3 x6 x5.(subset_of(x5,x2) | -v_wear(e3) | -of(x5,x6) | -n_business(x6) | -n_attire(x5) | -Actor(e3,x5)) & a_speaking(s1) & Theme(s1,x1) & Actor(e2,x4)) & Topic(e1,p1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3.(v_ride(e1) & on(e1,x3) & of(x3,x1) & n_wave(x2) & n_surfboard(x3) & n_male(x1) & n_boy(x1) & Theme(e1,x2) & Actor(e1,x1))