The specific sequence of events that led to Bourdin’s exposure — from Parker’s initial visual comparison to the Interpol fingerprint confirmation — is worth examining in closer detail because it reveals both how close Bourdin came to an extended success and how brittle the deception ultimately was once skeptical attention was applied.

Parker was not the first person to have doubts about “Nicholas.” Within the family, within the community, there appear to have been people who noticed the discrepancies and felt uncertain.

The accent alone — the distinctly French quality of his English — was impossible to ignore.

The eye color was visible to anyone who looked.

What distinguished Parker from others who had doubts was that he acted on them systematically rather than suppressing them.

He moved from doubt to action: from noticing the visual discrepancies to pursuing the verification that would confirm or dispel them.