premise: A man, boy and a white dog are looking at a display of postcards.
hypothesis: A man is all alone looking at postcards.
explanation_1: The man cannot be both alone and be with a boy and a dog.
explanation_2: It's either man, boy and a dog or a man alone.
explanation_3: man boy and dog doesn't mean alone
premise_logic: exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(at(e1,x5) & of(x5,x6) & n_postcard(x6) & n_display(x5) & Actor(e1,x1) & v_look(e1) & subset_of(x4,x1) & n_dog(x4) & a_white(s2) & Theme(s2,x4) & subset_of(x2,x1) & n_boy(x2) & a_,(s1) & Theme(s1,x2) & of(x2,x3) & n_man(x3))
hypothesis_logic: exists e1 s1 x1 x2.(for(s1,e1) & at(e1,x2) & n_postcard(x2) & Actor(e1,x1) & v_look(e1) & r_all(s1) & Theme(s1,x1) & a_alone(s1) & n_man(x1))