Editing 1237: QR Code

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If scanned, the QR code in the comic reads <tt>http://xkcd.com/1237/scan/</tt>, a link to a nearly identical image, but the line above the QR code reads, "To continue reading," and the caption reads, "How to trap a webcomic reader in an infinite loop". The QR code is identical to the previous one. So, if scanned again, it would simply return the scanner to the same image in an "infinite loop".
 
If scanned, the QR code in the comic reads <tt>http://xkcd.com/1237/scan/</tt>, a link to a nearly identical image, but the line above the QR code reads, "To continue reading," and the caption reads, "How to trap a webcomic reader in an infinite loop". The QR code is identical to the previous one. So, if scanned again, it would simply return the scanner to the same image in an "infinite loop".
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In the title text, it is revealed that not only is there a time limit, but that the QR code must be scanned using the same phone that's displaying the code. Doing this using the phone's own camera is impossible. The only way to scan the code using the same phone would be by taking a screenshot and opening it with an app that scans for QR codes in images, rather than using the camera. While such apps do exist, most smartphone users would have no need for such an app and are unlikely to have one installed.
 
  
 
==Transcript==
 
==Transcript==

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