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Single Source of Truth per Fact

For every recurring fact, designate one official place it lives, and turn every other copy into a link to it.

45 min Intermediate

Goal

End version conflicts (a price in a sheet differs from a slide) by forcing every fact to one updatable source, with everything else pointing to it.

Steps

  1. 1
    Pick 5 facts that change regularly and appear in more than one document (prices, team roster, policies).
5 more steps locked

Expected Outcome

Immediate
You find at least one number with two conflicting live copies right now.

Evidence base

School: Information Architecture / Second Brain

Founders: Tiago Forte · Edward Tufte (2017)

Single Source of Truth originates in database engineering; Tiago Forte applied it to personal and org knowledge in Building a Second Brain.

Keywords

Frequently asked questions

How long does "Single Source of Truth per Fact" take?
This exercise takes about 45 minutes, practiced solo in a Behavioral format.
When will I notice the effect of "Single Source of Truth per Fact"?
You find at least one number with two conflicting live copies right now. In the short term: Within a month, "which number is correct?" messages vanish from team chats.
Is "Single Source of Truth per Fact" evidence-based?
Yes — it draws on Information Architecture / Second Brain (Tiago Forte, Edward Tufte (2017)). Single Source of Truth originates in database engineering; Tiago Forte applied it to personal and org knowledge in Building a Second Brain.
Is "Single Source of Truth per Fact" suitable for beginners?
Its difficulty level is: Intermediate. No external tools required — it can be practiced directly inside the app.

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