premise: A man gives a speech at an ornate costume party.
hypothesis: The person is a keystone speaker.
explanation_1: A man giving a speech may not necessarily mean that he is a KEYSTONE speaker.
explanation_2: Not every speaker is a keystone speaker.
explanation_3: Giving a speech doesn't imply being a keystone speaker.
premise_logic: exists e1 s1 x1 x2 x3 x4.(at(e1,x3) & n_party(x3) & of(x3,x4) & n_costume(x4) & a_ornate(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_speech(x2) & n_man(x1))
hypothesis_logic: exists p1 x1.(n_person(x1) & exists x2 x3.((x1 = x2) & n_speaker(x2) & of(x2,x3) & n_keystone(x3)))