premise: Four dirt bike riders are riding on a dirt road.
hypothesis: The riders are in a race.
explanation_1: Just because the riders are riding doesn't imply they are in a race.
premise_logic: exists e1 x1 x2 x3 x4 x5.(on(e1,x4) & n_road(x4) & of(x4,x5) & n_dirt(x5) & Actor(e1,x1) & v_ride(e1) & n_rider(x1) & of(x1,x3) & n_bike(x3) & of(x1,x2) & n_dirt(x2) & card_eq_4(x1))
hypothesis_logic: exists p1 x1.(n_rider(x1) & exists x2.(in(x1,x2) & n_race(x2)))
premise_sim: exists e1 x1 x2 x3 x4 x5.(v_ride(e1) & on(e1,x4) & of(x4,x5) & of(x1,x3) & of(x1,x2) & n_road(x4) & n_rider(x1) & n_dirt(x5) & n_dirt(x2) & n_bike(x3) & card_eq_4(x1) & Actor(e1,x1))
hypothesis_sim: exists x1.(n_rider(x1) & exists x2.(n_race(x2) & in(x1,x2)))