premise: A track sprinter takes off after he hears the starting horn.
hypothesis: The man is swimming.
explanation_1: The man cannot simultaneously be swimming and be a sprinter
explanation_2: One man is a runner/sprinter and the other man is swimming.
explanation_3: It is impossible to swim and take off as a track sprinter at the same time.
premise_logic: exists e2 e1 p1 s1 x1 x2 x3.(n_horn(x3) & Actor(e2,x3) & v_start(e2) & exists e3.(Theme(e3,x3) & Actor(e3,x1) & v_hear(e3)) & n_male(x1) & after(e1,p1) & a_off(s1) & Manner(e1,s1) & Actor(e1,x1) & v_take(e1) & n_sprinter(x1) & of(x1,x2) & n_track(x2))
hypothesis_logic: exists p1 x1.(n_man(x1) & exists x2.((x1 = x2) & n_swimming(x2)))