premise: An old man holds up a sign.
hypothesis: A man is sleeping.
explanation_1: One would not be holding up a sign while simultaneously sleeping.
explanation_2: The man cannot hold up the sign and be sleeping at the same time.
explanation_3: It would be difficult to hold a sign while sleeping.
premise_logic: exists e1 s1 s2 x1 x2.(a_up(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_sign(x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_sleep(e1) & n_man(x1))