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<p>[QUOTE=&quot;jtlee321, post: 2618807, member: 73983&quot;]This is funny.&nbsp; The second I saw the images, I saw the obverse as relief and the reverse as incuse.&nbsp; I know that the brain takes a short cut in defining what you see when it see&#039;s something familiar.&nbsp; In this case, it recognizes a human head and by nature, it knows a human head is in relief. So the assumption is automatically made that anytime a human face is seen, your brain stops analyzing the structure and assumes relief.&nbsp; It&#039;s pretty cool how you can trick your brain.</p><p><br /></p><p>Here&#039;s the ultimate video in how your brain will confuse you.&nbsp; It&#039;s a well known optical illusion of a paper dragon.</p><p><br /></p><p>[MEDIA=youtube]A4QcyW-qTUg[/MEDIA][/QUOTE]</p><p><br /></p>

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