premise: A man is working on a computer while two people sit and talk in front.
hypothesis: A bear is working on a computer while two people sit and gawk.
explanation_1: Either a man or a bear is working.  The two people are either talking or gawking.
explanation_2: Someone working on a computer cannot be a man and a bear at the same time. To talk is not the same as to gawk.
explanation_3: One sentence features a man, the other has a bear.
premise_logic: exists e1 p1 x1 x2.(exists e2 e3 x3 x4 x5.(in(e3,x5) & n_front(x5) & Actor(e3,x4) & v_talk(e3) & n_people(x4) & card_eq_2(x4) & Actor(e2,x3) & v_sit(e2) & n_people(x3) & card_eq_2(x3)) & while(e1,p1) & on(e1,x2) & n_computer(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1))
hypothesis_logic: exists e1 p1 x1 x2.(exists e3 e2 x3 x4.(Actor(e3,x4) & v_gawk(e3) & n_people(x4) & card_eq_2(x4) & Actor(e2,x3) & v_sit(e2) & n_people(x3) & card_eq_2(x3)) & while(e1,p1) & on(e1,x2) & n_computer(x2) & Actor(e1,x1) & v_work(e1) & n_bear(x1))
premise_sim: exists e1 p1 x1 x2.(while(e1,p1) & v_work(e1) & on(e1,x2) & n_man(x1) & n_computer(x2) & exists e2 e3 x3 x4 x5.(v_talk(e3) & v_sit(e2) & n_people(x4) & n_people(x3) & n_front(x5) & in(e3,x5) & card_eq_2(x4) & card_eq_2(x3) & Actor(e3,x4) & Actor(e2,x3)) & Actor(e1,x1))
hypothesis_sim: exists e1 p1 x1 x2.(while(e1,p1) & v_work(e1) & on(e1,x2) & n_computer(x2) & n_bear(x1) & exists e3 e2 x3 x4.(v_sit(e2) & v_gawk(e3) & n_people(x4) & n_people(x3) & card_eq_2(x4) & card_eq_2(x3) & Actor(e3,x4) & Actor(e2,x3)) & Actor(e1,x1))