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Proof Argument

Summary: When and how to construct a genealogical proof argument (also called a proof summary) when direct evidence is insufficient or conflicting.

Sources: National Society, Sons of the American Revolution.md (GCP Sections 3.2000–3.2003), # Sons of the American Revolution (SAR).md (APG, Using a Proof Argument; Appendix E)

Last updated: 2026-04-15

When a Proof Argument Is Required (GCP 3.2000)

A genealogical proof argument is necessary when evidence on its own fails to lead to a clear conclusion. Common situations:

  1. There is conflicting evidence
  2. There is an identity problem (two persons of the same name in the same area)
  3. The conclusion requires indirect evidence
  4. The applicant wishes to clarify a conclusion

A proof argument is also needed whenever multiple indirect sources must be combined to establish a lineage link or service that cannot be proven with a single direct document. (source: # Sons of the American Revolution (SAR).md, APG Using a Proof Argument)

Note: "Proof argument" and "proof summary" are interchangeable terms. Proof summaries tend to be shorter, but the difference is not formal. The Application Preparation Guide uses "proof argument" as the standard term. (source: # Sons of the American Revolution (SAR).md, APG Using a Proof Argument)

Required Elements of a Proof Argument

A proof argument must include: 1. Statement of the problem — what fact cannot be established with direct evidence 2. Reason a proof argument is needed — why direct evidence is unavailable or insufficient 3. Listing of included documents — all sources used 4. Analysis of each document — how each source relates to resolving the problem 5. Conclusion — based on the analysis

The argument must exhaust available sources and address any conflicting evidence, including the presence of multiple individuals of the same name in the same location. (source: # Sons of the American Revolution (SAR).md, APG Using a Proof Argument)

Submit a separate proof argument for each link not established by acceptable evidence or for each situation with conflicting evidence. (source: # Sons of the American Revolution (SAR).md, APG Using a Proof Argument, Note 1)

SAR Tools

The SAR Proof Argument Analysis Tool and the SAR Service Analysis Tool may be used as suggested frameworks for constructing a proof argument following the GPS, as outlined in The BCG Genealogical Standards Manual. (source: National Society, Sons of the American Revolution.md, GCP 3.2000; # Sons of the American Revolution (SAR).md, APG)

How to Reference a Proof Argument on the Application

List the proof argument in the appropriate "Reference" or "Proof of Service" section of the application, along with all supporting documentation citations:

Name of the proof argument: citation of first document; citation of second document; etc.

If document citations carry over to another page, use an additional legal-size SAR watermarked bond page and indicate which generations it applies to. (source: # Sons of the American Revolution (SAR).md, APG Proof Arguments)

Three Common Forms of Indirect Evidence (GCP 5.3000)

When building a proof argument for lineage:

  1. Circumstantial evidence: Show how multiple interactions between two people are consistent with a close family relationship
  2. Process of elimination: Show that only one candidate could be the ancestor given known facts
  3. Deductive reasoning: Chain evidence from multiple documents to reach a conclusion

Using Inadmissible Documents in Proof Arguments

An inadmissible source (e.g., an unsourced family history) cannot prove a fact on its own but can be cited alongside admissible documentation in a proof argument. The inadmissible source provides context or leads; the admissible evidence provides the proof. Both must be cited. (source: # Sons of the American Revolution (SAR).md, APG Published Sources)

Example Research Tips for Brick Walls

From Appendix E of the Application Preparation Guide:

  • Check original records: Published abstracts may omit bondsmen, parental permissions, or executors who received gifts by deed and thus were not named in bequests
  • Siblings and relatives: What cannot be proven in the ancestor's own records may appear in records of brothers, sisters, aunts, uncles, or nephews — sibling relationships can lead to proof of shared parentage
  • Land records: Deeds between parent and child often use nominal consideration ("$1" or "for natural love and affection"); later partition deeds among heirs name the deceased's children; releases of dower rights may provide the wife's surname
  • Newspapers: Probate notices must be published in local papers and may name heirs with their residences; obituaries may identify heirs not in any will
  • Census records: Use wildcard searches for variant spellings; search by approximate age and birthplace of all known family members, not just the head of household; browsing the complete census record of a location can find missed entries
  • [[genealogical-proof-standard]]
  • [[acceptable-sources]]
  • [[inadmissible-sources]]
  • [[lineage-proof]]
  • [[dna-evidence]]