premise: A group of men playing music, the man holding a guitar is talking to a man with drums.
hypothesis: A string quartet is practicing.
explanation_1: They can't be practicing while talking.
explanation_2: Just because a group of men are playing music it does not mean they are a string quartet or that they are practicing.
explanation_3: Playing music and practicing are different things.
premise_logic: exists e1 e2 e3 x1 x2 x3 x4 x5 x6 x7 x8.(to(e3,x7) & with(x7,x8) & n_drum(x8) & n_man(x7) & Actor(e3,x1) & v_talk(e3) & of(x1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & rel(x4,x2) & Theme(e1,x6) & Actor(e1,x5) & v_hold(e1) & n_guitar(x6) & (x2 = x5) & n_man(x2) & n_man(x2) & n_music(x4) & (x2 = x3) & n_group(x1))
hypothesis_logic: exists e1 x1 x2.(Actor(e1,x1) & v_practice(e1) & n_quartet(x1) & of(x1,x2) & n_string(x2))