Corrupt
From AMule Project FAQ
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Corrupt stands for anything which isn't exactly the same as the original, whatever it is.
In the eD2k network, it is usually referred to any file or chunk or part that has been altered in some byte (or bit) and is not the same as the original any longer.
Since the eD2k network is very sensible to data integrity, it detects 99% of the file corruptions. Hardly ever a corrupted file will be downloaded through the eD2k network unless it was originally shared corrupted.
Do not confuse corrupt with fake.