premise: Two men and a lady are standing outside.
hypothesis: They are riding the bus.
explanation_1: While people can be standing and riding a bus at the same time, the sentences are contradictory. Sentence 1 refers standing outside and sentence 2 refers to riding the bus.
explanation_2: Riding the bus implies that they are inside and sitting down which is the opposite of standing outside.
explanation_3: They cannot be standing outside and riding a bus the same time.
premise_logic: exists e1 s1 x1 x2 x3.(a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & subset_of(x3,x1) & n_lady(x3) & subset_of(x2,x1) & n_man(x2) & card_eq_2(x2))
hypothesis_logic: exists e1 x1 x2.(n_bus(x2) & n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1))