premise: Two muddy boys swim.
hypothesis: Two clean boys walk.
explanation_1: Muddy is not clean, and you cannot walk while you swim.
premise_logic: exists e1 s1 x1.(Actor(e1,x1) & v_swim(e1) & n_boy(x1) & a_muddy(s1) & Theme(s1,x1) & card_eq_2(x1))
hypothesis_logic: exists e1 s1 x1.(Actor(e1,x1) & v_walk(e1) & n_boy(x1) & a_clean(s1) & Theme(s1,x1) & card_eq_2(x1))
premise_sim: exists e1 s1 x1.(v_swim(e1) & n_boy(x1) & card_eq_2(x1) & a_muddy(s1) & Theme(s1,x1) & Actor(e1,x1))
hypothesis_sim: exists e1 s1 x1.(v_walk(e1) & n_boy(x1) & card_eq_2(x1) & a_clean(s1) & Theme(s1,x1) & Actor(e1,x1))