premise: Two people looking at each other, a third person is not attentive.
hypothesis: Two people are looking at each other.
explanation_1: In both sentences looking is the key component.  In the first sentence two people looking and in the second two people are looking.
premise_logic: exists s1 x1.(-exists e1 s2 x2 x3.(rel(s2,x2) & all x4.(n_other(x4) -> at(e1,x4)) & Actor(e1,x3) & v_look(e1) & (x2 = x3) & n_people(x2) & card_eq_2(x2) & Theme(s2,x1) & a_attentive(s2)) & n_person(x1) & a_third(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 x1.(all x2.(n_other(x2) -> at(e1,x2)) & Actor(e1,x1) & v_look(e1) & n_people(x1) & card_eq_2(x1))
premise_sim: exists s1 x1.(n_person(x1) & all e1 s2 x2 x3.(exists x4.(n_other(x4) & -at(e1,x4)) | -v_look(e1) | -rel(s2,x2) | -n_people(x2) | -card_eq_2(x2) | -a_attentive(s2) | -Theme(s2,x1) | -Actor(e1,x3) | -(x2 = x3)) & a_third(s1) & Theme(s1,x1))
hypothesis_sim: exists e1 x1.(v_look(e1) & n_people(x1) & card_eq_2(x1) & all x2.(at(e1,x2) | -n_other(x2)) & Actor(e1,x1))