premise: A man and a woman are walking next to a flower display case and an escalator.
hypothesis: A brother and his sister are walking.
explanation_1: WE have no idea if they are brother and sister, they could be anyone.
explanation_2: A man and a woman are not necessarily brother and sister.
explanation_3: Not all men and women have a brother and a sister.
premise_logic: exists e1 x1 x2 x3 x4 x5 x6 x7 x8.(to(e1,x4) & subset_of(x8,x4) & n_escalator(x8) & subset_of(x5,x4) & n_case(x5) & of(x5,x7) & n_display(x7) & of(x5,x6) & n_flower(x6) & r_next(e1) & Actor(e1,x1) & v_walk(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
hypothesis_logic: exists e1 x1 x2 x3.(Actor(e1,x1) & v_walk(e1) & subset_of(x3,x1) & n_sister(x3) & of(x3,x2) & n_male(x2) & subset_of(x2,x1) & n_brother(x2))