premise: A man is tossing a knife in the air while another man stands nearby.
hypothesis: A man prepares to throw a knife at his friend
explanation_1: The man is not necessarily his friend.
explanation_2: he may be doing a trick and not prepares to throw at friend
explanation_3: A man preparing to throw a knife doesn't mean he is throwing to the friend.
premise_logic: exists e1 p1 x1 x2 x3.(n_air(x3) & exists e2 s1 x4.(a_nearby(s1) & Manner(e2,s1) & Actor(e2,x4) & v_stand(e2) & n_man(x4) & -(x4 = x1)) & n_man(x1) & n_man(x1) & while(e1,p1) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_toss(e1) & n_knife(x2))
hypothesis_logic: exists e1 p1 x1 x3.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 x2.(at(e2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_throw(e2) & n_knife(x2)) & n_friend(x3) & of(x3,x1) & n_male(x1) & n_man(x1))