premise: a group of people are wearing costumes
hypothesis: People are going to a Halloween party.
explanation_1: people wear costumes other places than a Halloween party
explanation_2: We have no idea if they are going to a Halloween party, people dress up for a number of reasons.
explanation_3: People can wear costumes for other reasons, not necessarily for a Halloween party.
premise_logic: exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_costume(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
hypothesis_logic: exists e1 x1 x2 x3.(to(e1,x2) & n_party(x2) & (x2 = x3) & ne_org_halloween(x3) & Actor(e1,x1) & v_go(e1) & n_people(x1))