premise: A person in a ken-do outfit is standing there waiting.
hypothesis: Nobody is standing
explanation_1: If "nobody" is standing then a person cannot be standing.
explanation_2: If a person is standing that means somebody not nobody is standing.
explanation_3: There is a person in the first sentence and nobody in the second sentence.
premise_logic: exists e2 e1 s1 s2 x1 x2.(for(e1,e2) & Actor(e2,x1) & v_wait(e2) & a_there(s2) & Manner(e1,s2) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_outfit(x2) & a_ken-do(s1) & Theme(s1,x2) & n_person(x1))
hypothesis_logic: -exists e1 x1.(Actor(e1,x1) & v_stand(e1) & n_person(x1))