Warning, this thread is dedicated for spoilers. If you hate spoilers, this is the best chance to hit the "go back one page" button.
I don't about other people I never noticed how big the plot hole in Chobits until very recently and let me explain you:
...And then the revelation:
...And of course the biggest plot hole in the show, which most of you missed:
I wish CLAMP can re-write Chobits and fill most of its plot holes but too bad CLAMP already said to us they had enough with Chobits and let the franchise dead for good(of their own).