I claim I can't find?
It is a fact I can't find it.
It is a fact that no-one can find it, including you and all your mates.
It was just a sick lie, told by a sick liar.

Of course, you could always produce something and make me look silly, but you will come up with some pathetic reason why you won't.

Everyone will then know you are not just a liar, but a fool too.