premise: A dog is walking down steps.
hypothesis: A dog is laying on the couch.
explanation_1: A dog can't be walking and laying at the same time.
explanation_2: A dog cannot be laying down and walking  simultaneously
explanation_3: The dog cannot be walking and laying down at the same time.
premise_logic: exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_step(x2) & n_dog(x1))
hypothesis_logic: exists e1 x1 x2.(n_couch(x2) & on(e1,x2) & Actor(e1,x1) & v_lay(e1) & n_dog(x1))
premise_sim: exists e1 s1 x1 x2.(v_walk(e1) & n_step(x2) & n_dog(x1) & a_down(s1) & Theme(e1,x2) & Manner(e1,s1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2.(v_lay(e1) & on(e1,x2) & n_dog(x1) & n_couch(x2) & Actor(e1,x1))