Symbols can mean different things in different articles. Definitions below are shown only when an equation guide or its article provides one; otherwise the entry identifies where to read the equation in context.
Symbol Delta_checker: inflation from a verifier that can be satisfied by something other than a correct solution — a weak test suite, a policy that exploits how success is graded rather than what it is graded on.
Symbol Delta_configuration: variance from everything about how the question was asked, formatted, and scored — prompt wording, decoding settings, which variant answered.
Symbol Delta_fingerprint: a shift, in either direction, from the policy detecting that it is inside an evaluation and adjusting its behavior because of that detection alone, independent of the task.
Symbol Delta_leak: inflation from the environment itself disclosing the solution — through its history, its documentation, or a live network path to the answer.