Contemporary examples of the sort of scribal phenomena we find in ancient MSS sometimes offer interesting points of comparison. Herewith a recent example I experienced. In an essay for a composite volume I had written:
“In addition, nearly the whole New Testament could be reconstructed on the basis of quotations by ancient writers.”
Somewhere in the process between submission and page proofs, an anonymous editor, presumably educated and experienced, re-wrote it to read:
“In addition, nearly ancient writers could reconstruct the whole New Testament on the basis of quotations.”
Almost certainly a deliberate change--to recast the sentence from a passive to active form--and certainly nonsensical and amusing.