Is This Evidence Of Just How Brilliant Prince William Is: Knight of the Garter at Just 25!?

It isn't reasonable to have someone on the throne who does not have this particular knighthood, and this is just a way of getting him used to the job a little bit at a time. Ancestry comes into it, not brilliance. And there is no need to be sarcastic about it. If an ordinary person receives an honour, they can be fairly sure it's because they've done something to merit it, but he will never know if he is receiving something just because he is royal.