Gryffindor: Why aren't koalas considered bears?
Ravenclaw: Because they are marsupials.
Gryffindor: bEcAuSe ThEy ArE mArSuPiAlS.
Slytherin: *snicker*
Gryffindor: No, it's because they don't meet the koala-fications.
Hufflepuff: *laughter*
Ravenclaw: *facepalm*