It's (what they're describing is) just reverse engineering. That's what reverse engineering is.
replyFortunately reverse engineering too is in the dictionary - to help anyone mistaking it for spec generation.
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replyImplying that I did make such mistake, which I did not, unless you're willfully taking me overly literal.
replyNor did they make any mistakes when they described how they produced a specification, (and indeed, that it is a specification) despite your insinuation otherwise, for a similar reason.
Maybe instead of pointing towards dictionaries, stop pretending that you lack reading comprehension, and get off of your high horse please.