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A comment on Reverse Logic.

Re:Reverse Logic by ams6110 on Sunday August 02, 2015 @06:04PM (#9992658)
For increased accuracy, each page was keyed by two different typists in order to identify and correct discrepancies

This was a common practice used for systems that took data entry via punch cards as well (during the punch-card era).

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Re:Reverse Logic by jsprogrammer on Monday August 03, 2015 @12:05AM (#9993729)
Modern practice for things that undergo a D-A-D transition is to include a secondary (often lossy compressed) representation that can be used to validate that the data was correctly replicated.
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