premise: A young man, wearing a T-shirt that says Joplin, plays the guitar in front of a large amplifier.
hypothesis: The young man is a guitar player
explanation_1: A guitar player plays the guitar.
explanation_2: If he plays the guitar, he would be considered a guitar player
explanation_3: One must play the guitar to be a guitar player.
premise_logic: exists e2 e1 e3 s1 s2 x1 x2 x3 x4 x5 x6 x7.(ne_per_joplin(x7) & n_guitar(x2) & for(e1,e3) & Theme(e3,x5) & Actor(e3,x1) & v_wear(e3) & Theme(e2,x7) & Actor(e2,x6) & v_say(e2) & (x5 = x6) & n_t-shirt(x5) & in(e1,x3) & of(x3,x4) & n_amplifier(x4) & a_large(s2) & Theme(s2,x4) & n_front(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1))
hypothesis_logic: exists p1 s1 x1.(n_man(x1) & a_young(s1) & Theme(s1,x1) & exists x2 x3.((x1 = x2) & n_player(x2) & of(x2,x3) & n_guitar(x3)))