Well here, lemme make it easy for you how to explain this.

[Sitting down, she picked up two pillows and set them side by side.] Okay say this green pillow is your home, where you live. And then this yellow pillow is Mayfield. What Mayfield did was scan you, everything that makes you Gohan, and then put it here, in Mayfield.

That's how I knew you. You were much older when this process happened, so I knew you as a young teenager. With me so far?