premise: A man on one miniature train passes a circular object to a man on another train as they pass by.
hypothesis: Two trains of different sizes but following each other side by side going to opposing directions.
explanation_1: One cannot both pass by and follow each other.  Just because one man is on a miniature train, it does not necessarily mean that the two trains are different sizes.
explanation_2: it never stated that the trains were different sizes.
explanation_3: Just because one train is miniature doesn't mean the other train is a different size.
premise_logic: exists e1 p1 s1 x1 x2 x3 x4 x5 x6.(exists e2 s2.(a_by(s2) & Manner(e2,s2) & Actor(e2,x1) & v_pass(e2)) & n_thing(x1) & as(e1,p1) & on(e1,x6) & n_train(x6) & -(x6 = x2) & n_train(x2) & n_train(x2) & to(e1,x5) & n_man(x5) & Theme(e1,x4) & Actor(e1,x1) & v_pass(e1) & n_object(x4) & a_circular(s1) & Theme(s1,x4) & on(x1,x2) & of(x2,x3) & n_miniature(x3) & card_eq_1(x2) & n_man(x1))
hypothesis_logic: exists x1 x2 x3 x4 x5 x7.(n_side(x7) & n_size(x4) & a_topic(x1) & of(x1,x2) & all x6.((-(x6 = x7) & n_side(x6)) -> exists e2 e1 s1 x8 x9 x10.(subset_of(e1,x2) & by(e1,x8) & to(e2,x10) & n_direction(x10) & a_opposing(s1) & Theme(s1,x10) & Actor(e2,x9) & v_go(e2) & (x8 = x9) & n_side(x8) & Theme(e1,x6) & Actor(e1,x5) & v_follow(e1))) & n_thing(x5) & subset_of(x3,x2) & -(x3 = x4) & n_size(x3) & n_train(x1) & card_eq_2(x1))