Ground truth — Ground truth is the most authoritative version of a fact, the one other versions are checked against. For a business’s legal name and status, the state registry filing is usually the ground truth. When in doubt about how to write a fact, follow the ground truth. It is the version you can always defend.

Added October 21, 2026

Ground truth — Ground truth is the verified correct answer used to train or test an AI system. It might be a confirmed diagnosis, a checked fact, or an accurate label. Model quality depends on how reliable the ground truth is. Errors in it carry straight into the model.

Added October 21, 2026