The purpose for the call was concerning the body plate error/human error theory. He told me not to over think it
In summary He thought the error was possible but not normal.
How about a key puncher lady? Last time I spoke to them there were two them that were still pretty sharp. If they will speak to you they will tell you about punching IBM cards 8-10 hours a day non-stop.
Do you have a copy of Echoes Yet?