premise: Man in plaid shirt sings into microphone while playing an acoustic guitar.
hypothesis: A man is walking.
explanation_1: A man who sings into a microphone while playing guitar cannot usually also be walking.
explanation_2: If a man sings into a microphone he isn't walking.
explanation_3: The man cannot complete both physical tasks at once.  He either sings while playing guitar or is walking.
premise_logic: exists e2 e1 s1 s2 x1 x2 x3 x4 x5 x6.(while(e1,e2) & Theme(e2,x6) & Actor(e2,x1) & v_play(e2) & n_guitar(x6) & a_acoustic(s2) & Theme(s2,x6) & rel(e1,x3) & in(x3,x4) & n_sing(x4) & of(x4,x5) & n_shirt(x5) & a_plaid(s1) & Theme(s1,x4) & n_man(x3) & into(e1,x2) & n_microphone(x2) & Actor(e1,x1) & v_event(e1) & n_thing(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_man(x1))
premise_sim: exists e2 e1 s1 s2 x1 x2 x3 x4 x5 x6.(while(e1,e2) & v_play(e2) & v_event(e1) & rel(e1,x3) & of(x4,x5) & n_thing(x1) & n_sing(x4) & n_shirt(x5) & n_microphone(x2) & n_man(x3) & n_guitar(x6) & into(e1,x2) & in(x3,x4) & a_plaid(s1) & a_acoustic(s2) & Theme(s2,x6) & Theme(s1,x4) & Theme(e2,x6) & Actor(e2,x1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1.(v_walk(e1) & n_man(x1) & Actor(e1,x1))