premise: A band performing with a girl singing and a guy next to her singing as well while playing the guitar
hypothesis: They are an all-guy band.
explanation_1: An all-guy band would not have a girl in it.
explanation_2: A girl cannot be a part of an all-guy band.
explanation_3: It is not an all-guy band if there is a girl performing.
premise_logic: exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_guitar(x8) & a_topic(x1) & while(e1,e2) & Theme(e2,x8) & Actor(e2,x2) & v_play(e2) & r_as(e1) & a_well(s1) & Manner(e1,s1) & with(e1,x3) & subset_of(x6,x3) & to(x7,x4) & n_singing(x4) & n_singing(x4) & of(x4,x1) & n_female(x1) & next(x6,x7) & n_thing(x7) & n_guy(x6) & subset_of(x4,x3) & of(x4,x5) & n_girl(x5) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_band(x1))
hypothesis_logic: exists p1 x1.(n_thing(x1) & exists s1 x2.((x1 = x2) & n_band(x2) & a_all-guy(s1) & Theme(s1,x2)))