Separate known and returned details
Make a short list of what you knew before the query, separately from what appeared only in the response. This avoids circular verification: an assumption found in a report is not independent support for that same report. Do not retrospectively treat unknown parameters as facts.
Similar names and accounts
For example, two hypothetical records share a name, but one has no birth date. That is not enough to merge them. Likewise, the same username on two platforms does not establish a common owner. Look for additional reliable details and preserve uncertainty when they are missing.
Dates and contradictions
An age, contact or location can refer to different periods. Do not apply the report creation time to every record. When values conflict, do not choose the convenient one without justification. Check source, date and attribution; keep versions separate if the discrepancy remains unexplained.
A conclusion that fits the evidence
Write a conclusion in three parts: what is supported, what conflicts and what is unknown. Row counts or report completeness do not replace careful verification. If details are insufficient, the appropriate conclusion is that no unique match has been established, rather than an identity claim.