premise: People sitting in chairs along a tree-lined sidewalk.
hypothesis: People are standing on the pavement
explanation_1: People cannot  be sitting and standing at the same time.
explanation_2: People cannot be sitting in chairs if they are standing.
explanation_3: People cannot be sitting and standing simultaneously.
premise_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x3) & along(x3,x4) & n_sidewalk(x4) & a_tree-lined(s1) & Theme(s1,x4) & n_chair(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1))
hypothesis_logic: exists e1 x1 x2.(n_pavement(x2) & on(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))