premise: A young man is riding a dirt bike while standing up.
hypothesis: The young man standing on the dirt bike is performing a stunt.
explanation_1: Despite the fact he's riding a dirt bike while standing, there's no way to say with certainty that the young man is performing a stunt because he could just as easily be practicing or just fooling around.
explanation_2: Just because he is standing up does not mean he is performing a stunt.
explanation_3: Riding a dirt bike while standing doesn't necessarily mean performing a stunt.
premise_logic: exists e1 e2 s1 s2 x1 x2 x3.(while(e1,e2) & a_up(s2) & Manner(e2,s2) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_man(x1) & a_young(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 e2 s1 x1 x2 x3 x4 x5.(n_bike(x3) & of(x3,x4) & n_dirt(x4) & n_man(x1) & a_young(s1) & Theme(s1,x1) & Theme(e2,x5) & Actor(e2,x1) & v_perform(e2) & n_stunt(x5) & on(e1,x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2))
premise_sim: exists e1 e2 s1 s2 x1 x2 x3.(while(e1,e2) & v_stand(e2) & v_ride(e1) & of(x2,x3) & n_man(x1) & n_dirt(x3) & n_bike(x2) & a_young(s1) & a_up(s2) & Theme(s1,x1) & Theme(e1,x2) & Manner(e2,s2) & Actor(e2,x1) & Actor(e1,x1))
hypothesis_sim: exists e1 e2 s1 x1 x2 x3 x4 x5.(v_stand(e1) & v_perform(e2) & on(e1,x3) & of(x3,x4) & n_stunt(x5) & n_man(x1) & n_dirt(x4) & n_bike(x3) & a_young(s1) & Theme(s1,x1) & Theme(e2,x5) & Actor(e2,x1) & Actor(e1,x2) & (x1 = x2))