4.1 Redundancy
Multiple copies reduce the chance that one fire, decay event, theft or political purge will erase a work completely.
4.2 Geographic distribution
Copies allow a work to move between courts, temples, monasteries, schools, markets and private collections.
4.3 Temporal survival
A damaged or obsolete exemplar can be renewed on fresh material.
4.4 Standardisation
Authorised exemplars and checking practices can stabilise liturgical, legal, scholarly and administrative texts.
4.5 Variation
Copying generates spelling changes, omissions, repetitions, substitutions, glosses and rearrangements.
4.6 Interpretive mediation
Scribes may resolve ambiguity, modernise language, clarify references or adjust content for a new audience.
4.7 Textual families
Shared variants reveal genealogical relationships among manuscripts and support reconstruction of transmission.
4.8 Labour infrastructure
Scriptoria, schools, workshops and court bureaus organise sustained reproduction before mechanisation.