premise: Man in chair laughing and talking to others, while handling books.
hypothesis: Man takes library books back from customers.
explanation_1: You can not infer they are library books.
explanation_2: Just because a man is talking to others and handling books does not mean he is taking the books back from customers.
explanation_3: The books are not necessarily library books.
premise_logic: exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & in(x1,x2) & while(e1,e2) & Theme(e2,x7) & Actor(e2,x5) & v_handle(e2) & n_book(x7) & subset_of(e1,x2) & to(e1,x6) & -(x6 = x1) & n_person(x1) & n_person(x6) & Actor(e1,x5) & v_talk(e1) & n_thing(x5) & subset_of(x3,x2) & n_laughing(x3) & of(x3,x4) & n_chair(x4) & n_man(x1))
hypothesis_logic: exists e1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_back(x2) & from(x2,x4) & n_customer(x4) & n_book(x2) & of(x2,x3) & n_library(x3) & n_man(x1))