Don't make direct accusations without evidence. Don't constantly interrupt. Don't look for "universal signs" like avoiding eye contact (this doesn't always indicate a lie). Effective detection relies on narrative inconsistencies, not isolated gestures. Some nervous people may give the impression of lying. Some trained people can lie with great consistency.
The best tool is not aggressive confrontation, but patient observation.
Final thought: This viral expression simplifies a complex process. It's not about capturing, but about understanding. The truth tends to remain stable over time.
Lies require constant maintenance. And when a story changes under the pressure of simple questions… it’s usually not by chance.
