Me: Literally anything. Almost 2 year old daughter:
No.
But seriously... She's so much fun now but everything is a quick and stern "No". Sometimes I hit the jackpot and ask her something that she actually wants and it's "Yayeeeah".
As they say, generally a repeated 'why' is not out of pure interest, it's a bit for attention. After a few of those, feel free to give nonsense answers.