premise: An enthusiastic boy pushes a shopping cart containing a smiling boy.
hypothesis: A boy is walking on the street
explanation_1: Nothing says that the boy is walking on the street.
explanation_2: Just because a boy is pushing a boy in a cart does not mean they are walking on the street.
explanation_3: You're usually walking when pushing a shopping cart, but you can also run. Also shopping carts aren't always pushed on the street; the boy could have been pushing it inside the store.
premise_logic: exists e3 e1 e2 s1 x1 x2 x3 x4 x5.(Theme(e3,x2) & Actor(e3,x1) & v_push(e3) & Theme(e2,x5) & Actor(e2,x4) & v_contain(e2) & n_boy(x5) & Actor(e1,x5) & v_smile(e1) & (x2 = x4) & n_cart(x2) & of(x2,x3) & n_shopping(x3) & n_boy(x1) & a_enthusiastic(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 x1 x2.(n_street(x2) & on(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_boy(x1))
premise_sim: exists e3 e1 e2 s1 x1 x2 x3 x4 x5.(v_smile(e1) & v_push(e3) & v_contain(e2) & of(x2,x3) & n_shopping(x3) & n_cart(x2) & n_boy(x5) & n_boy(x1) & a_enthusiastic(s1) & Theme(s1,x1) & Theme(e3,x2) & Theme(e2,x5) & Actor(e3,x1) & Actor(e2,x4) & Actor(e1,x5) & (x2 = x4))
hypothesis_sim: exists e1 x1 x2.(v_walk(e1) & on(e1,x2) & n_street(x2) & n_boy(x1) & Actor(e1,x1))