Great start! It's definitely not weird. I like your readable, conversational style. There are a few changes I'd recommend to make it even better:
1. Cut the part about "ask an average person" -- the average answer will depend on the context, for example if you ask "What is china?" while staring pointedly at a teacup.
This section is just a distraction. Instead stress both the capitalization and the context, especially that it's described as "one.. of the following countries."
2. Frankly, your argument is airtight and it's obviously intended to be a country. But an important part of a good argument that's most often overlooked is the impact. You have one -- "we won't have a very educational debate" -- but you kind of rush over it and don't stress it. Spend a little more time elaborating on why we want to have an educational debate and how bad it would be if we don't (wasting time, etc), and then directly relate it to the judge voting for you, because your definition provides the educational debate.
3. Finally, never end with "and that's all I have to say" if you can help it -- it weakens the point of your argument and really isn't necessary. End with a strong impact like "Vote for me so we can have an educational debate" and then just move on to introduce your next point.
Since you posted over a week ago, you might have turned your homework in already, but I thought I'd give my ideas anyway because they can help you fine-tune other arguments as well.