To me, decoding a QR code by hand is a cool feat, like solving a Rubik’s cube. It is very unlikely that you will ever need to do it. And like you said, it’s an

To me, decoding a QR code by hand is a cool feat, like solving a Rubik’s cube. It is very unlikely that you will ever need to do it. And like you said, it’s an excellent way to teach implementors of automated QR code readers/writers.