Subliminal advertising is where campaigns are flashed for 1/28th of a second during a tv show, exploiting the viewer's subconsious to as the advertising scheme.
Watch this clip from IronChef America. Everything proceeds as normal, and suddenly a red flash appears. You brain is not quick enough to accurately percieve what the flash is, but without reason, you start to feel hungry. You start to crave for fast food... slowing the clip down reveals that in a split second frame, an icon of Maccers pops up. Quickly enough for one to ignore, but also effective enough for the subconscious to capture.
Subliminal advertising is proof of rapid cognition. Subliminal advertising is proof of the blink.