What do you consider the true source of data (Source of Truth)?

The true source of truth (Source of Truth) is called the single reliable and up-to-date source of information that all systems and processes rely on. This can be a database, API, or document that guarantees data consistency and accuracy.

For example, in a warehouse management system, the Source of Truth is the database where current information about product availability is stored. All other services get data from this source to avoid discrepancies.