Cyberia, you are right of course. But brevity is not one of my skills, and her questions sometimes take me by surprise. And then I ramble.
But she is a very bright girl, and she listens. Once, when she was about 3 1/2 we were at the Hayden Planetarium, and I tried to get her to look at a depiction of the solar system.
She waved her hand and dismissed me and said "I know ALL ABOUT the solar system already. Venus, Mars, Saturn has rings, Jupiter is really big and Pluto isn't a planet anymore because it got too small."
And she led me off to some exhibit that allowed her to push buttons or pull levers, and I decided that even if she didn't know quite everything there is to know about the solar system, she had somehow absorbed an impressive amount for a 3 year old.