premise: Two construction workers perched on an I beam, assembling a building frame.
hypothesis: The two men are brothers.
explanation_1: You can not infer they are brothers.
explanation_2: Just because two construction workers are perched on an I beam it does not mean they are brothers.
explanation_3: two construction workers need not necessarily be brothers.
premise_logic: exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(Theme(e2,x6) & Actor(e2,x1) & v_assemble(e2) & n_frame(x6) & of(x6,x7) & n_building(x7) & on(e1,x4) & n_beam(x4) & of(x4,x5) & n_i(x5) & Theme(e1,x3) & v_perch(e1) & (x1 = x3) & n_worker(x1) & of(x1,x2) & n_construction(x2) & card_eq_2(x1))
hypothesis_logic: exists p1 x1.(n_man(x1) & card_eq_2(x1) & exists x2.((x1 = x2) & n_brother(x2)))