SYSE.Reference:14 - Source use and epistemic status

Each pattern carries its own source-use decisions, adopted payload, rejected shortcuts, evidence limits, and reopen conditions. Standards, textbooks, academic attention, vendor claims, institutional promotion, and press coverage can identify candidate Methods or terminology. They do not by themselves show actual project use, causal effectiveness, widespread retention, or state of the art. When direct prevalence evidence is unavailable, label the value as an expert estimate and state its uncertainty.