<p>Magic.
</p><p>No, really. I'd expect most potential explanations to fall into one of three categories:
</p>
- "Wait, that doesn't actually explain anything!" (throwing around a code word like "midichlorians")
- "Wait, that's totally unbelievable!" (like, military artificial intelligence experiment gone mad, somehow escaping into a toy factory)
- "Wait, that's just plain stupid!" (they are ghosts trapped in plastic bodies, somehow ending up with Microsoft voices)
<p>So I'd rather take no explanation over a disappointing one.
</p><p><small>Isn't a highlight a little spurious?</small>
</p>