We take Plato’s Theaetetus into the age of AI and ask a simple question with complicated consequences: what is data? Walking through three Socratic attempts—cataloguing examples, calling data “perception,” and treating data as true belief—we expose how each definition breaks and what that reveals about measurement, error, and authority in modern systems.

The episode shows how perception ties data to perspective, how “true judgment” fails when identity, proxies, stale records, or inaccessible sources produce false conclusions, and how adding an “account” (explanation) raises standards—and political questions—about who can justify decisions.

Concise and provocative, this conversation turns a philosophical knot into a practical checklist for builders, policymakers, and everyday users: definitions matter, explanations matter more, and governance matters most. Share your one‑sentence definition of data and join the next episode where we interrogate what counts as an adequate account in AI, regulation, and product design.