The whole procedure seems to hinge on catching some people assigned to engage in a naive effort at deception - people who have constructed a story from whole cloth. It seems likely that anyone attempted a sophisticated act of deception wouldn&#x27;t invent a story but rather take their true experiences and rearrange them to fill holes where things they wouldn&#x27;t describe are, giving them an unlimited number of true details to recite. Spending some time on learning the rearrangement would give someone a stronger grasp of their supposed itinerary than the average person has of their actual itinerary.<p>Which is to say this probably catches confused people and people hiding harmless but embarrassing facts but probably isn&#x27;t useful against &quot;determined evil doers&quot;.