To begin, remember that genealogy is a complex pursuit involving high-level research skills and AI is a computer program.
To effectively prevent AI from generating plausible but false information—known as "hallucinations"—you must structure your prompts to reward honesty over guessing. Because AI systems are typically trained to provide helpful-sounding answers even when they are uncertain, your prompts must explicitly give the AI permission to admit what it does not know.
It is also necessary to provide AI with enough initial background information to understand your questions. Take time to formulate your questions. Always begin a prompt by telling the AI to act as “professional genealogist using the Genealogical Proof Standard and doing reasonably exhaustive research.?
Here are some suggested prompt strategies and templates to keep AI accurate and grounded:
1. The Uncertainty Permission Prompt
Explicitly tell the AI that an honest admission of uncertainty is preferred over a guess. This overrides the AI's default training to always provide an answer.
● Prompt Example: "I need your help with [research question]. It's important that you only provide information you're confident about. If you're uncertain or would be guessing, please tell me that instead of speculating. I'd rather have an honest 'I don't know' than a confident guess."
2. The "According To" Prompt
Direct the AI to base its response strictly on specific sources or data you provide, which grounds the output in actual information rather than speculation.
● Prompt Example: "According to the [specific record/source], what does it say about [your ancestor]?"
3. The Step-Back Prompt
Because AI is much less likely to hallucinate general historical facts than specific details about an unknown individual, ask it to explain the broader historical context before diving into your specific research question.
● Prompt Example: "What were the typical occupations and neighborhoods for Irish immigrants in Boston during the 1850s? After that, help me create a research plan for finding specific information about my ancestor John O'Brien."
4. The Constrained-Choice Prompt
Instead of asking an open-ended question that invites the AI to invent creative explanations, provide specific multiple-choice options for the AI to evaluate.
● Prompt Example: "I can't find my ancestor in the 1880 census. Which of these explanations is most likely? A. They died between 1870 and 1880. B. They moved to a different state. C. There's an enumeration error. D. The census page is damaged. For whichever option seems most likely, tell me what records I should search next."
5. The Source-Citation Request
Always require the AI to explain where its information comes from. Knowing you will ask for a source makes the AI less likely to hallucinate, or it will back down if it was guessing.
● Prompt Example: "Please provide sources for your information or, if you're speaking generally, tell me where I could verify these facts."
6. The Chain-of-Verification Prompt
Force the AI to critically evaluate the output it just generated to help it recognize its own speculation.
● Prompt Example: "Based on your previous response, what question should I ask to verify that information? What would prove or disprove each claim you made?"
7. The Role-Specific "Honesty Clause" Prompt
Assign the AI a persona that strictly values accuracy over appearing knowledgeable.
● Prompt Example: "Act as a professional genealogist who values accuracy over appearing knowledgeable... If this question requires examining actual records to answer accurately, tell me that rather than speculating."
8. The Advanced "Master" Prompt Framework
If you want the AI to act as a rigorous analytical assistant, you can use a highly structured "Master Prompt" known as "The Professional Genealogy Research Architect." This instructs the AI to operate under strict professional standards.
● Key instructions to include: Tell the AI to evaluate evidence taxonomy (Original/Derivative source, Primary/Secondary information, Direct/Indirect evidence). Instruct it to look for conflicts, use the "FAN Club" filter (Friends, Associates, and Neighbors), assign a Weight of Evidence score, and use placeholders if a citation cannot be fully formed. Finally, demand a "Red-Team" analysis where the AI must "Identify the weakest link in the evidence chain and suggest one specific scenario that could disprove the current hypothesis."
General Rules for Safe Prompting:
● Provide evidence, don't ask for miracles: Never ask an AI open-ended questions like "Who are my ancestors?" or "Find my great-grandfather." This almost always leads to confident nonsense. Instead, provide the AI with real evidence you have collected and ask specific research strategy questions.
● Always require a source: Make it a hard rule that the AI must cite its sources for any claim. An unsourced fact is useless for research. Treat AI as your research assistant—not a primary source.
You should consider stringing a number of these prompts together to assure more accuracy. The prompts do not guarantee accuracy, but they do help to keep AI on track.