premise: A four piece band plays a song on a medium-size stage.
hypothesis: A three piece band plays a song on a medium-size stage.
explanation_1: A three piece band cannot also be a four piece band.
explanation_2: The four piece band is mentioned first then a three piece
explanation_3: There is either three or four pieces.
premise_logic: exists e1 s1 x1 x2 x3 x4.(Time(e1,x4) & n_band(x4) & on(e1,x3) & n_stage(x3) & a_medium-size(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_song(x2) & n_piece(x1) & card_eq_4(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4.(Time(e1,x4) & n_band(x4) & on(e1,x3) & n_stage(x3) & a_medium-size(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_song(x2) & n_piece(x1) & card_eq_3(x1))