ascertainable

This term carries a strong connotation of objectivity and empirical proof. It is most frequently encountered in legal, technical, or financial contexts where the ability to verify a fact is a prerequisite for a claim or a contract. It suggests that the truth is not a matter of opinion or estimation, but can be pinpointed exactly using a specific methodology.

Because it describes a capacity for discovery, it is often contrasted with terms like "speculative" or "indeterminate." While "knowable" is a broader synonym, "ascertainable" specifically implies a process of active determination, such as auditing records or conducting a scientific measurement, to reach a definitive conclusion.