premise: Two children run along a boardwalk that crosses over a body of water.
hypothesis: Some boys are playing with Legos.
explanation_1: Some boys would normally refer to more than two children.  The children could not be running on the boardwalk while playing with Legos.
premise_logic: exists e1 e2 x1 x2 x3 x4 x5.(along(e1,x2) & over(e2,x4) & of(x4,x5) & n_water(x5) & n_body(x4) & Actor(e2,x3) & v_cross(e2) & (x2 = x3) & n_boardwalk(x2) & Actor(e1,x1) & v_run(e1) & n_child(x1) & card_eq_2(x1))
hypothesis_logic: exists e1 x1 x2.(ne_org_legos(x2) & with(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))
premise_sim: exists e1 e2 x1 x2 x3 x4 x5.(v_run(e1) & v_cross(e2) & over(e2,x4) & of(x4,x5) & n_water(x5) & n_child(x1) & n_body(x4) & n_boardwalk(x2) & card_eq_2(x1) & along(e1,x2) & Actor(e2,x3) & Actor(e1,x1) & (x2 = x3))
hypothesis_sim: exists e1 x1 x2.(with(e1,x2) & v_play(e1) & ne_org_legos(x2) & n_boy(x1) & Actor(e1,x1))