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The same goes for emails, in my experience.
(lemmy.world)
People tweeting stuff. We allow tweets from anyone.
RULES:
Printing a hard copy seems to make mistakes materialize out of nowhere for me.
some xerox photocopiers had a "feature" where the copier would use OCR to scan the document (by default even) and then replace multiple instances of one letter (which may have all printed slightly differently before) with one instance of the same letter exactly, just copy+pasted into different places. if you were lucky it would even replace a "d" for example with a "b". the resulting documents look tampered with, not to mention that it breaks the perfect paper trail your organization is supposed to have.
...it was a legitimate issue with scanned technical drawings unpredictably changing dimensions...