premise: A man stands over a brown and black dog in the grass.
hypothesis: A dog is playing outside with its owner.
explanation_1: The first sentence only says the man and dog are in the grass.  It doesn't say the man is the owner, nor does it say what else they are doing.  I can't infer that they are outside playing.
premise_logic: exists e1 s1 s2 x1 x2 x3.(n_grass(x3) & in(e1,x3) & over(e1,x2) & n_dog(x2) & a_black(s2) & Theme(s2,x2) & a_brown(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
hypothesis_logic: exists e1 x1 x2.(with(e1,x2) & n_owner(x2) & of(x2,x1) & n_thing(x1) & r_outside(e1) & Actor(e1,x1) & v_play(e1) & n_dog(x1))
premise_sim: exists e1 s1 s2 x1 x2 x3.(v_stand(e1) & over(e1,x2) & n_man(x1) & n_grass(x3) & n_dog(x2) & in(e1,x3) & a_brown(s1) & a_black(s2) & Theme(s2,x2) & Theme(s1,x2) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2.(with(e1,x2) & v_play(e1) & r_outside(e1) & of(x2,x1) & n_thing(x1) & n_owner(x2) & n_dog(x1) & Actor(e1,x1))