premise: A young man is holding a small boy who is wearing a backpack in front of a derelict building in a poor country.
hypothesis: A man is touring a city with his son
explanation_1: Just because they are in front of a building doesn't mean that they are in a city.  It cannot be inferred that the boy is his son. The boy could be unrelated.
explanation_2: A small boy is not son to just any man. Not all buildings are in a city. Not all people wearing backpacks are touring a location.
explanation_3: The young boy is not necessarily his son, and it can't be implied that they are touring a city.
premise_logic: exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(Theme(e2,x2) & Actor(e2,x1) & v_hold(e2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & in(x4,x5) & of(x5,x6) & in(x6,x8) & n_country(x8) & a_poor(s3) & Theme(s3,x8) & n_building(x6) & of(x6,x7) & n_derelict(x7) & n_front(x5) & n_backpack(x4) & (x2 = x3) & n_boy(x2) & a_small(s2) & Theme(s2,x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_tour(e1) & with(x2,x3) & n_son(x3) & of(x3,x1) & n_male(x1) & n_city(x2) & n_man(x1))
premise_sim: exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(v_wear(e1) & v_hold(e2) & of(x6,x7) & of(x5,x6) & n_man(x1) & n_front(x5) & n_derelict(x7) & n_country(x8) & n_building(x6) & n_boy(x2) & n_backpack(x4) & in(x6,x8) & in(x4,x5) & a_young(s1) & a_small(s2) & a_poor(s3) & Theme(s3,x8) & Theme(s2,x2) & Theme(s1,x1) & Theme(e2,x2) & Theme(e1,x4) & Actor(e2,x1) & Actor(e1,x3) & (x2 = x3))
hypothesis_sim: exists e1 x1 x2 x3.(with(x2,x3) & v_tour(e1) & of(x3,x1) & n_son(x3) & n_man(x1) & n_male(x1) & n_city(x2) & Theme(e1,x2) & Actor(e1,x1))