I agree with @try67 about not trusting A1. I've seen some patently wrong answers.
Acrobat can be confusing because it does a number of different, sometimes unrelated, things. For example, redaction has nothing to do print production.
However, I DO agree with @ODuinn that the various signature options need a clear decision-tree chart to guide users as to what option(s) is the best to use at the moment for their needs.
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