premise: A young man, wearing a T-shirt that says Joplin, plays the guitar in front of a large amplifier.
hypothesis: The man is a Janice Joplin fan.
explanation_1: Just because a man wears a t-shirt with the word "Joplin" on it does not mean that he is a Janice Joplin fan.
explanation_2: It is not must that all wearing T-shirt says Joplin are Janice Joplin fans
explanation_3: Not all men are young. Just because someone is wearing a shirt that says "Joplin" does not mean that they are a fan of Janice Joplin. Not all Janice Joplin fans can play guitar or do so in front of a large amplifier.
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 x1.(n_man(x1) & exists x2 x3 x4.((x1 = x2) & n_fan(x2) & (x2 = x4) & ne_org_joplin(x4) & (x2 = x3) & ne_org_janice(x3)))