Oho!~ a challenge??? uh-hoo!~~ Lets see... "dunno" and "donno" Mr. Xgen, if you understand what colloquial means, such words are colloquial. Whether you use dunno or donno, they are not standard written English anyway. Nobody can say either is wrong. As long as there is a group of people who use and understand, that is cool enough. Afterall, thats what colloquials are for. Good luck with your English!~