Ask Mr. Wizzo!

Response:

All I can say is: If I'm not me, who am I?

Perhaps someone better than me... No, wait, that's impossible. I'll go with me.



Also, if I doubt were to see its shadow, the only way to prove it would be to associate a meaningless prediction with it (as with Groundhog Day) and see if it comes true. if it does, then the doubt obviously saw its shadow.

If it doesn't... Shoot the doubt.