I just had this revolutionary idea the other day, and it is so mind-bogglingly awesome, I find it hard to believe that nobody has used the idea already. Welcome to Mydoppelganger.net, a search engine designed to find your very own doppelganger. Most people like to think that they're unique but the sorry truth is, we aren't. The possibility that one out of six billion people can be truly outstanding is a statistical impossibility. Given the unequal distribution of resources and social stratification, it's not hard to see why we don't exactly see two of everybody because the difference in opportunities makes sure that one succeeds while the other fails.
Now when I say "doppelganger," I don't mean someone who looks and thinks like you -- hell, or even someone with the same name as you. I've had the rare fortune to meet someone who had the same first and last name as me, and I can tell you, it's quite interesting (especially considering she's a girl). She is what I would call, a nominal doppelganger -- that is, doppelganger in name only. You can pretty much find this easily, and one way to do that is to just type your name in and see what comes up. The history of "Thanh Le" in a search engine, unfortunately, does not yield any exceptional results (yet anyways).
My search engine does not concern itself with such trivial nominal variables such as name, sex, or age, but rather, it will match people on the basis of their personality type and preferences. It will deliver to the end-user, a person who is identical to you in every way except for appearance and name. Now why on earth would anybody ever want to find their double? Why haven't you heard? Two heads are plainly better than one, and if you have someone who thinks like you, it's like multiplying your thinking power by 2x!
That's certainly one possibility, but there's also one other reason to find your doppelganger. In some cultures, meeting your double is bad news, akin to seeing a black cat or walking under a ladder. There's a whole manhwa (Korean manga) based around the concept (I can't recall the name, but don't worry, it sucks). Misfortune and doppelgangers are inextricably linked, so why on earth would we want to risk the wrath of god for an opportunity to meet our double? Easy: to kill him or her.
Conventional wisdom dictates that if power is divided, then reducing the number of divisions will only increase the power of each remaining unit. This concept has been showcased in the aptly named movie, "The One," starring Jet Li and Jason Statham. Even though that movie dealt with parallel universes, the concepts still apply. Having the strength, speed, and intelligence of two people should be more than enough for even the most retarded man on earth (at the very least he becomes competent). Consolidation of physical and mental attributes would be the primary reason why you would want to find your doppelganger. All of a sudden, my service is no longer some trivial "hey-this-looks-kind-of-cool!" non-sense site, but rather, it is a gateway -- a portal to a new you. A stronger, faster, and smarter you. What are you waiting for? Why not power yourself up right now? Oh, that's right, because you can't find your doppelganger.
Well then, welcome to mydoppelganger.net.