premise: The man and woman are both smiling.
hypothesis: A man and a woman are frowning looking at the clock.
explanation_1: The people can't be smiling while they are frowning.
explanation_2: A man and a woman cannot do smiling and frowning at a time.
explanation_3: smiling and frowning, both actions cannot take place simultaneously.
premise_logic: exists e1 s1 x1 x2 x3.(n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & a_both(s1) & Manner(e1,s1) & Actor(e1,x1) & v_smile(e1))
hypothesis_logic: exists e1 p1 x1 x2 x3 x4.(n_clock(x4) & exists e2.(at(e2,x4) & Actor(e2,x1) & v_look(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_frown(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))