premise: two young children on a skateboard going across a sidewalk
hypothesis: Two young children riding on a bike.
explanation_1: The children can't be on a skateboard and bike on the same time.
explanation_2: Children can't be on a skateboard and riding a bike at the same time.
explanation_3: Children on a skateboard  cannot be riding on a bike the same time.
premise_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & across(e1,x4) & n_sidewalk(x4) & Actor(e1,x3) & v_go(e1) & (x2 = x3) & n_skateboard(x2) & n_child(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_bike(x3) & Actor(e1,x2) & v_ride(e1) & (x1 = x2) & n_child(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
premise_sim: exists e1 s1 x1 x2 x3 x4.(v_go(e1) & on(x1,x2) & n_skateboard(x2) & n_sidewalk(x4) & n_child(x1) & card_eq_2(x1) & across(e1,x4) & a_young(s1) & a_topic(x1) & Theme(s1,x1) & Actor(e1,x3) & (x2 = x3))
hypothesis_sim: exists e1 s1 x1 x2 x3.(v_ride(e1) & on(e1,x3) & n_child(x1) & n_bike(x3) & card_eq_2(x1) & a_young(s1) & a_topic(x1) & Theme(s1,x1) & Actor(e1,x2) & (x1 = x2))