To unmask a liar, you only need to ask them two questions…

“Tell me exactly how it happened, step by step.”
When someone tells the truth, they generally remember events with a certain fluency, even if they forget minor details.A liar tends to:

Being too lazy
or excessively detailed in irrelevant parts.
Avoid a clear chronology.
Asking for a step-by-step reconstruction increases cognitive pressure.

Inconsistencies usually appear when the narrative needs to be structured.

“What happened just before and just after?”