Are you sure that's the answer?

Yes. No wait......yes.

It depends on your ammount of security. Not like the body guard kind but, the kind about yourself. If you know who you are and what your suppose to do, you know who you are.

Because I don't Know Why I'm Not Sure If I'm Sure Or Not Sure Or Even If I'm Sure Enough About Being Sure... Do You Know What I Mean? I Bet You Are Not Sure Now...

The difference is that we do not say "I am for sure." The valley-girl adverb "for sure" means "certainly."

Either Death and Taxes or an underarm deodorant.