Ancient correctors of authoritative texts — Galen's editing of classical works, scriptural emendation — preferred marking a passage as suspect over silently overwriting it, because they lacked standing to alter a text more authoritative than their own certainty
ArchBook's "Corrections" entry traces correction practice back through antiquity and states that ancient correctors of authoritative texts treated silent overwriting as presumptuous, preferring to mark a passage as suspect and point the reader elsewhere. Scribes used an obelus (÷), asterisk (*), or dagger († ‡) in the margin "to identify suspicious passages" and "call attention to potential alternate readings instead of simply correcting or writing over the text." The entry names Galen (123–c.200 AD) as an ancient scholar "often reluctant to alter a text with a correction, preferring simply to mark it and signal the need to go back to earlier texts for reference."
The same entry states the caution was sharpest for scripture, where "few scholars had enough knowledge of Hebrew to ascertain minute differences in the original texts," and that "corrections needed to be done carefully so as to not disturb accepted readings and practices that had become the foundation of religious devotion" — the same logic (no standing to alter a text whose authority outranks the corrector's certainty) that claim-masoretic-qere-ketiv-kept-corrections-in-margin-never-altering-sacred-text documents for the Hebrew Bible specifically, from an independent source. The entry (citing Seth Lerer) extends the same caution into early print: the errata sheet is "a rich 'place holder in the ongoing narratives of bookmaking and book reading'" — a record of the book's own history of having been found wrong, rather than a repair that erases the fact of the error. This sits beside the vault's existing print-era correction mechanics (claim-early-modern-printers-corrected-print-with-cancel-slips, claim-stop-press-correction-produces-within-edition-variance) as the rationale those mechanics served, and beside claim-mishnah-eduyot-gives-explicit-reasons-for-recording-rejected-legal-opinions and claim-masoretic-qere-ketiv-kept-corrections-in-margin-never-altering-sacred-text as a third, independent tradition stating a version of the same principle.
Source
“Marginal notes marked by an obelus (÷), an asterisk (*), or a dagger († and ‡) were used by scribes to identify suspicious passages and helped critics call attention to potential alternate readings instead of simply correcting or writing over the text.”
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