many different levels you know i mean for one thing digital imaging technology has progressed so much that we can't always be sure of something that we're seeing is completely free is real or fake by merely looking at it and it's also this exhibition is about the thrill of deception which is actually the title of the exhibition i'm going to quote them all three knees who once said that you know man is his own easiest and best do because what he wishes to be true he generally believes to be true not the statement that you could apply to much of today obviously was our era of fake news than dissin from ation but demosthenes actually lived three hundred odd years before christ back in ancient greece so what we'll see at this exhibition is that artists have really been playing around with our senses for millenia and they've packed four thousand years of optical illusions into this exhibition so it's a really good opportunity for that classic double take. things are not always what they seem the third dimension here is pure illusion. a corridor that looks