You Have Read This Post Before

In my high school biology class, Mr. Glover floated the theory that Deja Vu was a time-lag problem--you saw an image, but the chemical symbol of the stimulus reached your interpretive centers from one eye an instant before the other one, so that...get it? This is a post about Deja Vu...which I posted twice...so you read it already...get it? Do you? Do you??? DO YOU???????