premise: During calf roping a cowboy calls off his horse.
hypothesis: A man ropes a calf successfully.
explanation_1: Man does not necessarily mean cowboy.
explanation_2: A man cannot call off his horse and rope a calf successfully.
explanation_3: A cowboy who calls (falls) off his horse isn't going to ropes a calf successfully.
premise_logic: exists e2 e1 s1 x1 x2 x3 x4.(during(e2,x4) & n_calf(x4) & a_off(s1) & Manner(e2,s1) & Theme(e2,x3) & Actor(e2,e1) & v_call(e2) & n_horse(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_rope(e1) & n_cowboy(x2) & n_thing(x1))
hypothesis_logic: exists e1 s1 x1 x2.(a_successfully(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_rope(e1) & n_calf(x2) & n_man(x1))