premise: An old man and a child walk together along a pathway near a building.
hypothesis: There are no people walking.
explanation_1: If the is an old man and a child then there is somebody walking not no people.
explanation_2: There cannot be both know people and an old man and a child walking.
explanation_3: There can be people walking such as an old man and child or there are no people walking. There can not be both together.
premise_logic: exists s1 s2 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x2,s1) & along(x2,x4) & near(x4,x5) & n_building(x5) & n_pathway(x4) & r_together(x2) & n_walk(x2) & of(x2,x3) & n_child(x3) & subset_of(x1,s1) & n_man(x1) & a_old(s2) & Theme(s2,x1))
hypothesis_logic: exists p1 x1.-exists e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_people(x2))