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Filed under: Brain Works, Educational, Fun Stuff, Geeky Stuff, Human Perception, Illusions, Optical Illusion, Perception Tagged: illusion, optical illusion, quirkology, Richard Wiseman, youtube 
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Filed under: Brain Works, Educational, Fun Stuff, Geeky Stuff, Human Perception, Illusions, Optical Illusion, Perception Tagged: illusion, optical illusion, quirkology, Richard Wiseman, youtube
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