Tomorrow, not tonight. Fifteen minutes.
Open any assistant and ask it a factual question about something obscure that you personally know well. Your hometown, a former employer, a niche part of your last job. Ask three times in three separate conversations, worded slightly differently.
Write down the three answers side by side.
You will know it worked when you can point at the specific thing that changed between the three, and say why a database would not have done that.