premise: People dressed in colorful outfits are gathered together.
hypothesis: People wore cosplay costumes to the party.
explanation_1: Not all colorful outfits are cosplay costumes.  Not all gatherings are parties.
explanation_2: Colorful outfits does not imply cosplay costumes and people can be gathered together without it being a party.
explanation_3: Colorful outfits are not always for cosplay costumes to the party.
premise_logic: exists e1 e2 s1 s2 x1 x2 x3.(a_together(s2) & Manner(e2,s2) & Theme(e2,x1) & v_gather(e2) & in(e1,x3) & n_outfit(x3) & a_colorful(s1) & Theme(s1,x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_people(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(n_party(x3) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & to(x2,x3) & n_costume(x2) & a_cosplay(s1) & Theme(s1,x2) & n_people(x1))