What match result is expected when using a probabilistic linkage protocol if only the last name differs?

In a probabilistic linkage protocol, the process of identifying matches between records considers various factors, including the likelihood of similarity based on available data. When only the last name differs between two records, this can create uncertainty in determining a definitive match because last names alone are common identifiers, and individuals can share the same last name.

Given this context, the identification of a potential match—due to the overwhelming similarity in other identifiers like first name, date of birth, and possibly other demographic information—would lead to a situation where the records are recognized as a "possible match". This indicates that while there may be significant evidence pointing to the records being linked, the discrepancy in the last name necessitates a manual review to confirm the match. Manual review would allow for the verification of additional identifying details that could support or refute the match.

Thus, the correct expectation in this scenario is that a possible match requiring manual review to resolve will be identified. This broadens the efficiency of the data linkage process by allowing human oversight where ambiguity exists, ensuring higher accuracy in the representation and understanding of the data.