In unverified sets, a single individual might be assigned two different ID numbers, or two different people might be grouped under one ID. Verification involves manual or algorithmic cross-referencing to ensure that every "subject" is truly unique and consistent throughout their aging sequence. 2. Accurate Metadata
: Research teams have published specific strategies for verifying the data, such as the MORPH-II: Inconsistencies and Cleaning Whitepaper , which highlights the necessity of correcting these errors before use. morph ii dataset verified