"- there are no transcription errors or mutations in a correct copy routine." You only know it's correct after you verify the fact so formally that should read

"- there are no transcription errors or mutations in a correct copy routine." You only know it's correct after you verify the fact so formally that should read ...correct copy and verify routine. Incidentally, we used to have switches to verify after copy such as /v but programming sloppiness and impatience - in having to wait extra time for the verify - has meant that the entropy for data processing integrity has increase as a consequence. Right, no one seems to give a damn about such matters these days.