related cats

I have a question that I've had for a while. If you seperate two kittens when they're 8 weeks of age, and you reunite them, will they remember each other? Or would they treat each other like an unrelated cat?

It depends on how long they've been separated, and how smart the cat is. There's no way to tell.
   
It's safest to treat them as stranger-cats until you're sure they're re-introduced properly.