May I answer? I would take issue with the idea that a machine that fails to effectively discriminate between illicit and non-illicit substances is actually effective.
Imagine if you were taking fingerprints and our fingerprints were not in fact unique. We would find fingerprints at a crime scene and say that it must be one of these five people, so we'll just convict them all.
We would not find that to be an effective use of that marker. I think we can make the same argument about this machine. It just simply does not discriminate effectively.