Redundant Copies

Part of Education & Knowledge Preservation

Making multiple copies of critical texts and knowledge to ensure survival against fire, flood, decay, and loss.

Why This Matters

A document that exists in only one copy is already half-lost. One fire, one flood, one careless moment, and generations of knowledge vanish. The Library of Alexandria is the most famous example, but history is filled with catastrophic knowledge losses — the destruction of Baghdad’s House of Wisdom in 1258, the burning of Maya codices by Spanish conquistadors, the countless monastery libraries lost to Viking raids. In every case, knowledge that existed in only one location was destroyed permanently.

In a post-collapse world, this risk is amplified. You have fewer documents to begin with, each one represents irreplaceable survival knowledge, and the threats — fire, weather, conflict, simple accidents — are constant. The only reliable defense is redundancy: multiple copies, stored in multiple locations, maintained by multiple people.

This is not merely good practice — it is a survival imperative. If your only copy of the medicinal plant guide burns, people will die from treatable conditions. If your only copy of the metalworking manual is lost in a flood, your community loses the ability to make tools. Redundancy is cheap insurance against catastrophic loss.

Determining What to Copy

Not everything needs multiple copies. Prioritize based on irreplaceability and criticality.

Priority Classification

Priority	Criteria	Target Copies	Examples
Critical	Unique knowledge, lives depend on it	3-5 copies	Medical procedures, water purification, poison identification
High	Important practical knowledge, hard to reconstruct	2-3 copies	Construction techniques, agricultural calendars, metalworking methods
Medium	Useful knowledge that could be reconstructed with effort	2 copies	Historical records, recipes, trade procedures
Low	Readily available or easily recreated knowledge	1 copy sufficient	Stories, personal records, administrative notes

The Criticality Test

Ask three questions about each document:

1. If this is lost, will people die or suffer serious harm? If yes: Critical priority.
2. If this is lost, could the knowledge be reconstructed from other sources or living experts? If no: increase priority by one level.
3. How many people depend on the information in this document? The more people affected, the higher the priority.

Single Points of Failure

If any piece of critical knowledge exists in only one copy AND only one person understands it, you have a double single point of failure. This is an emergency. Create copies and train additional people immediately.

Copying Methods

Hand Copying on Paper

The most straightforward method when paper or parchment is available.

Materials needed:

• Paper, parchment, or any suitable writing surface
• Ink (carbon-based inks last longest — lampblack mixed with gum arabic and water)
• Pens (quills, reed pens, or any pointed instrument)
• Good light (natural daylight is best — candlelight causes eye strain and errors)

Process for accurate copying:

1. Read the entire source document before beginning to understand its structure
2. Copy one section at a time — sentence by sentence for technical content, paragraph by paragraph for narrative
3. After each page, proofread by reading the copy while a second person reads the original aloud
4. Mark any uncertain readings with a small symbol in the margin
5. When complete, a third person should compare the full copy against the original

Speed vs. accuracy tradeoffs:

Method	Speed	Accuracy	Best For
One person copies alone	Fastest	Lowest (errors accumulate)	Low-priority documents
Dictation (one reads, one writes)	Medium	Medium	Medium-priority, speeds up production
Copy and verify (copy then proofread against original)	Slow	High	High-priority documents
Double-copy and compare (two people copy independently, then compare)	Slowest	Highest	Critical documents

Printing and Stamping

If you have access to printing technology (see Printing):

• Woodblock printing for frequently copied pages (maps, reference tables, medicinal dosage charts)
• Movable type for longer documents
• Rubber stamps carved from available materials for repeated symbols, logos, or classification marks

Printing dramatically increases copy speed and eliminates transcription errors within a print run.

Alternative Media

When paper is scarce, consider other surfaces:

Clay tablets:

• Press text into wet clay with a stylus
• Fire or sun-dry for permanence
• Extremely durable — Sumerian clay tablets have survived 5,000+ years
• Heavy and bulky, best for short critical texts (formulas, recipes, maps)

Bark and wood:

• Birch bark takes ink reasonably well
• Thin wood planks can be carved or written on
• Less durable than paper but widely available
• Treat with oil or wax for moisture resistance

Stone carving:

• Most permanent medium available
• Extremely slow to produce
• Reserve for the most critical, most permanent information
• Milestone markers, boundary stones, essential formulas

Textile:

• Write or embroider on cloth
• Flexible, portable, can be sewn into clothing or bags
• Less durable than paper but useful for carried references
• Wax-treated cloth resists water

Oral Backup

For the most critical knowledge, create oral copies as well (see Oral Tradition):

• Assign memorization of key texts to 3+ individuals
• Use rhyme and song to improve retention accuracy
• Regular recitation keeps oral copies fresh
• Oral copies survive when all physical copies are destroyed

Storage and Distribution

The Three-Location Rule

Every critical document should exist in at least three locations:

1. The active copy — in the library or workshop where it is used daily
2. The backup copy — in a separate building within the settlement
3. The remote copy — in a different settlement, geographic location, or secure cache

This protects against localized disasters. A fire might destroy the library, but the backup in the storage building and the remote copy in the neighboring village survive.

Secure Storage Locations

Requirements for backup storage:

• Waterproof — stone or brick construction, elevated above flood level, sealed containers
• Fireproof — stone is best, brick acceptable. No wooden structures for critical backup storage
• Climate-controlled — moderate, stable temperature and humidity (see Library Building for specific guidance)
• Accessible — someone must be able to retrieve documents when needed, but not so accessible that they are casually handled

Storage containers by durability:

Container	Water Resistance	Durability	Availability
Sealed clay jar	Excellent	Excellent	Make from local clay
Waxed leather pouch	Good	Good	Requires leather and beeswax
Oilcloth wrapping	Good	Moderate	Requires cloth and oil
Wooden box	Moderate	Good	Requires carpentry
Metal container	Excellent	Excellent	Requires metalworking

Rotation and Verification

Backup copies are worthless if they have degraded unnoticed:

1. Quarterly inspection — check all backup copies for moisture damage, insect damage, fading, and mold
2. Annual verification — compare backup copies against active copies to ensure they match (catching any corrections or updates made to the active copy)
3. Replacement schedule — plan to recopy documents before they degrade. Ink fades, paper becomes brittle. Do not wait until a document is unreadable.

Version Tracking

When a document is updated (corrected, expanded, improved), mark the update date on the document and all its copies. When copying updates to backups, note “Verified current as of [date]” on each copy. This prevents confusion between outdated and current versions.

Organizing a Copying Program

The Scriptorium Model

Medieval monasteries maintained copying workshops (scriptoria) that preserved Western knowledge through centuries of instability. Adapt this model:

Staffing:

• 1-2 dedicated copiers if your community can spare the labor
• Alternatively, rotate copying duty among literate community members (2-hour shifts)
• Train copiers in clear, legible handwriting — speed matters less than readability

Workflow:

1. Maintain a copying queue prioritized by the classification system above
2. Copier takes the next document from the queue
3. Copy according to the accuracy method appropriate to its priority level
4. Proofreader verifies the copy
5. Librarian assigns storage location and updates the catalog
6. Copy is delivered to its designated storage site

Quality Control

Errors in copies are worse than useless — they are dangerous. A wrong dosage in a medical text or a wrong ratio in a construction formula can kill.

Error prevention:

• Copy technical content character by character, not word by word
• Have a subject-matter expert review copies of technical documents (a doctor reviews medical copies, an engineer reviews construction copies)
• When in doubt about a reading, flag it rather than guessing
• Never copy from a copy if the original is available (errors compound with each generation)

The Copy-of-a-Copy Problem: Each generation of copying introduces errors. After 3-4 generations, the accumulated errors may be significant. Mitigate this by:

• Always copying from the oldest/most authoritative version
• Marking each copy with its generation number (Original, Copy 1, Copy 2…)
• Periodically comparing all copies and correcting against the best available version
• Replacing degraded originals with verified, clean copies while preserving the original text exactly

Special Considerations

Maps and Diagrams

Technical drawings, maps, and diagrams are harder to copy accurately than text:

• Use grid methods: overlay a grid on the original, draw the same grid on the copy, transfer contents square by square
• For maps, copy major features first (coastlines, rivers, roads) then add detail
• Include scale references that can be verified (known distances between landmarks)
• Have someone familiar with the territory verify map copies

Mathematical and Chemical Formulas

These require perfect accuracy — a single wrong number can be catastrophic:

• Always use the double-copy-and-compare method for formulas
• Have someone with mathematical knowledge verify calculations in the copy
• Write numbers with extreme clarity — distinguish 1 from 7, 6 from 0
• Include worked examples alongside formulas so future readers can verify the formula by checking the example

Multi-Language Documents

If your community includes speakers of different languages:

• Copy documents in their original language
• Create translated copies as separate documents, clearly marked as translations
• Note the translator and date on translated copies
• Where possible, include the original-language text alongside the translation for future verification

Building a Culture of Redundancy

The greatest threat to document survival is not fire or flood — it is complacency. People forget to make copies, delay replacements, and assume someone else is handling it.

Combat this by:

• Making copying a respected community role, not a punishment or chore
• Celebrating when a critical document reaches its target copy count
• Conducting annual “knowledge audits” — review what exists in only one copy and prioritize it for copying
• Teaching children to copy as part of their education — this serves the dual purpose of practicing literacy and creating redundancy
• After any document loss (fire, water damage, theft), immediately assess what was lost and begin recovery copying

Redundancy is the immune system of knowledge. It does not prevent individual documents from being destroyed — it ensures that destruction is never total. Build it systematically, maintain it diligently, and your community’s accumulated wisdom will survive whatever comes.