premise: A fisherman with his friend is setting up his pole.
hypothesis: Two brothers  fishing together for the first time in decades.
explanation_1: Two friends fishing are not necessarily brothers. Two men fishing are not necessarily doing so together for the first time in decades.
explanation_2: The first sentence only states there are two fishermen setting up to fish and doesn't state that they are two brothers who are fishing for the first time in decades.
explanation_3: Just because a fisherman with his friend is setting up his pole, doesn't mean they are fishing together for the first time in decades.
premise_logic: exists e1 s1 x1 x2 x3.(a_up(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x1) & v_set(e1) & n_pole(x3) & of(x3,x1) & n_male(x1) & n_male(x1) & with(x1,x2) & n_friend(x2) & of(x2,x1) & n_fisherman(x1))
hypothesis_logic: exists e1 p1 s1 x1 x2 x3 x4.(n_time(x3) & a_first(s1) & Theme(s1,x3) & a_topic(x1) & for(e1,x3) & in(x3,x4) & n_decade(x4) & exists s2.(Theme(s2,x2) & a_together(s2)) & Topic(e1,p1) & Actor(e1,x2) & v_fish(e1) & (x1 = x2) & n_brother(x1) & card_eq_2(x1))
premise_sim: exists e1 s1 x1 x2 x3.(with(x1,x2) & v_set(e1) & of(x3,x1) & of(x2,x1) & n_pole(x3) & n_male(x1) & n_friend(x2) & n_fisherman(x1) & a_up(s1) & Theme(e1,x3) & Manner(e1,s1) & Actor(e1,x1))
hypothesis_sim: exists e1 p1 s1 x1 x2 x3 x4.(v_fish(e1) & n_time(x3) & n_decade(x4) & n_brother(x1) & in(x3,x4) & for(e1,x3) & exists s2.(a_together(s2) & Theme(s2,x2)) & card_eq_2(x1) & a_topic(x1) & a_first(s1) & Topic(e1,p1) & Theme(s1,x3) & Actor(e1,x2) & (x1 = x2))