Single Source of Truth (SSOT)
Definition: One canonical place where a piece of information lives — eliminating ambiguity about which copy is current.
What it is
Single source of truth is the principle that for any given fact (a customer's status, a task's due date, a doc's current version) there should be exactly one place in the system that holds it. Multiple-source-of-truth systems create data drift, conflicting answers, and the eternal 'which spreadsheet is the right one?' problem.
Why it matters
Without an SSOT, AI features become unreliable (which version does the AI summarize?) and team coordination breaks down at scale.
Layer UI in context
Layer UI is the single source of truth for customer data, project status, and team decisions — no parallel spreadsheets, no shadow CRMs.
Related terms
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