premise: A man is working on a computer while two people sit and talk in front.
hypothesis: A man works on a computer while two people sit and chat about business.
explanation_1: The first sentence does not include the subject matter of their discussion, ie: business.
explanation_2: It can't be inferred from Sentence 1 that the two people are chatting about business.
explanation_3: Two people sit and talk doesn't imply that two people sit and chat about business.
premise_logic: exists e1 p1 x1 x2.(exists e3 e2 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 x5.(about(e3,x5) & n_business(x5) & Actor(e3,x4) & v_chat(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))