premise: Three people are outside walking up a set of wooden stairs.
hypothesis: Three people are walking outside down a set of stairs.
explanation_1: The people can't walk up and down the steps at the same time
explanation_2: The three people cannot be walking up and down a set of stairs at the same time.
explanation_3: People working up cannot be walking down the same time.
premise_logic: exists e1 s1 s2 s3 x1 x2 x3.(for(s1,e1) & a_up(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & of(x2,x3) & n_stair(x3) & a_wooden(s2) & Theme(s2,x3) & n_set(x2) & Theme(s1,x1) & a_outside(s1) & n_people(x1) & card_eq_3(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(down(e1,x2) & of(x2,x3) & n_stair(x3) & n_set(x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1) & n_people(x1) & card_eq_3(x1))