Synthetic Data Is a Claim About the World
Synthetic data is frequently presented as a practical escape from real-data constraints. When records are sensitive, scarce, imbalanced, expensive, or difficult to share, an organization can generate artificial observations that resemble the original population and continue developing models, testing systems, or publishing evidence.
That description is attractive and incomplete.
A synthetic dataset is not simply “fake data.” It is the output of a model that claims to preserve some properties of the world while suppressing or altering others. Its value depends on which properties survive, for which population, under which intended use, and with what privacy and disclosure risk.
The Federal Chief Data Officers Council’s 2024 request for information was therefore right to ask not only about applications, but about definitions, limitations, ethics, equity, and evidence. Federal synthetic-data practice should begin with a disciplined principle: every synthetic dataset is a bounded, testable claim.