Hi Rober – It is an excellent question, and not dumb at all.
I was thinking about the same issue with respect to Paul Brady’s currency project.
How can we get a response that shows the latest scan is significantly outside others in the same collection, i.e. an unknown.
In case CP don’t spot your question, I will ask them directly by PM, and share the answer. (unless you have already done so?).
Note: When you make your real collection, each sample should come from a different batch of pills so that you do not unfairly tighten the range of scan results. But to test “seen before?” it is exactly right! (please forgive me if you already understood that).