Nice title, right? In my efforts to knock your socks to obscurantist skies, I'm willing to offer a dollar to the first listener who can prove he or she already knows of this story (currently in the running (BY THE WAY) for Miette's Top Short Fiction Find of the Decade, and how's that for a reason to listen?). And how to prove this? I don't know. Lie detectors can be beaten. FMRI scans are not inexpensive, and neither are my own telepathic services.
I'm willing to offer two dollars, then, one if you can prove you know tonight's story before hearing it here, and another if you offer up a valid way to prove you did.