premise: A man with a beard sitting in front of the tour bus.
hypothesis: A boy is sweeping the sidewalk.
explanation_1: A man can't be a boy.
explanation_2: A man that is sitting on a bus is not a boy who is sweeping a sidewalk
explanation_3: A man and a boy are not the same thing.  Either he is sitting or sweeping and cannot do both at the same time.
premise_logic: exists e1 x1 x2 x3 x4 x5 x6.(n_bus(x5) & of(x5,x6) & n_tour(x6) & a_topic(x1) & with(x1,x2) & in(e1,x4) & of(x4,x5) & n_front(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_beard(x2) & n_man(x1))
hypothesis_logic: exists e1 x1 x2.(n_sidewalk(x2) & Theme(e1,x2) & Actor(e1,x1) & v_sweep(e1) & n_boy(x1))
premise_sim: exists e1 x1 x2 x3 x4 x5 x6.(with(x1,x2) & v_sit(e1) & of(x5,x6) & of(x4,x5) & n_tour(x6) & n_man(x1) & n_front(x4) & n_bus(x5) & n_beard(x2) & in(e1,x4) & a_topic(x1) & Actor(e1,x3) & (x2 = x3))
hypothesis_sim: exists e1 x1 x2.(v_sweep(e1) & n_sidewalk(x2) & n_boy(x1) & Theme(e1,x2) & Actor(e1,x1))