premise: Two men holding their mouths open.
hypothesis: Two men with gritted teeth.
explanation_1: the men are either holding their mouths open, or they are with gritted teeth.
explanation_2: Holding mouths open is not the same as gritted teeth which are biting down on teeth.
explanation_3: Men cannot have gritted teeth with their mouths open.
premise_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & Theme(s1,x4) & a_open(s1) & (x3 = x4) & n_mouth(x3) & of(x3,x1) & n_thing(x1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
hypothesis_logic: exists s1 x1 x2.(a_topic(x1) & with(x1,x2) & n_tooth(x2) & a_gritted(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))
premise_sim: exists e1 s1 x1 x2 x3 x4.(v_hold(e1) & of(x3,x1) & n_thing(x1) & n_mouth(x3) & n_man(x1) & card_eq_2(x1) & a_topic(x1) & a_open(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & (x3 = x4) & (x1 = x2))
hypothesis_sim: exists s1 x1 x2.(with(x1,x2) & n_tooth(x2) & n_man(x1) & card_eq_2(x1) & a_topic(x1) & a_gritted(s1) & Theme(s1,x2))