premise: A man is playing the guitar while on his right is another man looking at his keyboard.
hypothesis: Two men drink coffee.
explanation_1: You need two hands to play guitar, so the guitarist can not drink coffee and play at the same time, unlike someone looking at a keyboard..
explanation_2: a man playing guitar while another man looking at the keyboard is different from two men drinkcoffee
explanation_3: The man cannot drink coffee while playing guitar.
premise_logic: exists e1 p1 x1 x2 x3 x4 x7.(n_keyboard(x7) & of(x7,x3) & n_male(x3) & n_male(x3) & n_right(x4) & of(x4,x3) & n_guitar(x3) & exists e2 x5 x6.((x1 = x5) & at(e2,x7) & Actor(e2,x6) & v_look(e2) & (x5 = x6) & n_man(x5) & -(x5 = x1)) & n_man(x1) & n_man(x1) & on(e1,x4) & r_while(e1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_coffee(x2) & n_man(x1) & card_eq_2(x1))