premise: Man in leather jacket and scarf sits on purple cushion at a party.
hypothesis: A man is at his sisters party.
explanation_1: You can not infer is it his sisters party.
explanation_2: The party the man is at might be thrown by someone other than his sister.
explanation_3: Not everyone has sisters.
premise_logic: exists e1 x1 x2 x3 x4 x5 x6 x7 x8.(at(e1,x8) & n_party(x8) & on(e1,x6) & n_cushion(x6) & of(x6,x7) & n_purple(x7) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_scarf(x4) & n_jacket(x3) & of(x3,x5) & n_leather(x5) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
hypothesis_logic: exists p1 x1 x2 x3.(at(x1,x2) & n_party(x2) & of(x2,x3) & n_sister(x3) & of(x2,x1) & n_male(x1) & n_man(x1))