This is destined for flambait, but as long as its open i guess ill share my view.
The "chance" for these "machines" being built into us by means of natural seletion, evolution, and many more factors is more pluasible then you may think. For instance, there have you ever heard of the word "adaptation"? If so then youll be fully aware of the fact that over time, an organism can mutate, or atleast have the instince, to change something about itself. Given the time of the earths age, (around 4 billion years via uranium testing) then imagine the many mutations that could occur.
Another thing to consider is the rapid mutations viruses can go thru.
If a virus needs a new host, it has to be compatible to them, and thefore must mutate to be able to survive in them. A good example of this is the chicken flu that has recently been manifesting itself in China.
Now lets consider "inteligent design". Religion teaches us, usually thru the bible, that god created us, the earth, and the entire universe, in seven days (literal or not literal "days" depends on the reader). However, in the bible a passage mentions that god created "the two great lights(sun and moon) and the stars. As ancient man understood it, we were in the center of the universe, the "two great lights" were in orbit around us, and the stars even further out from us. We know now this not the case, and the stars hold their own importance, just as much as our sun. But with ancient man, this is not comprehendible, so therefore the bible seems to be in the view of a human writer, which then leads to questions of its authenticity of being devinly inspired. Another error in the bible is the story of the tower of babel, which says that when god was angry with its creaters, he confused there languages, makin some speak one language, and the other speak an other language. We know this is not true, language is created by humans, English is not devinly inspired, nor is any other language, thefore, the bible is wrong on that end as well.
In the end though, you can give someone all the evidence they want. but thell decide what is right in the end. I myself used to be a christian, untill i actully decided to question the great quantities of criticism toward evolution by my church. Its amazing how much they were wrong about, obviously whatever differed from there opinnion was wrong.
If you're so smart, why are you reading my post?