somehow i get the feeling i dont think i'll be saying anything that hasnt already been said twice of more this time around...
furry is simply a generalization, wether it be wolves trapped in human bodies, fellow spiritual shifters, or simply those who follow us because they like the artistic or roleplaying (or yes, even yiffy) side.
also, i consider anything possible, including things going as far as P-shifting though... it has to do with 'the force' though, and if anyone can do it, i'd believe he/she would almost have to come from an upbringing where he/she "knew" magic was real with absolutely no doubt (not very likely...)
as for therians, after reading some of their own rants, lets just say as much as i resemble a therian in beliefs i do not wish to be called one in the least.
i believe tis all a play on terminiolgy and mild "segregation" (cant think of a less harsh word, so this may be an overstatement) if you get right down to it