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WAN-IFRA Digital Media Awards Worldwide 2022
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Ask a polygraph expert: How do you spot a liar?

07:01 Min

Why is polygraph expert Malaravan Ponniah so good at telling if you are lying - even without the machine? And can you beat the machine? Our CNA Insider producer takes a lie detector test.

Why is polygraph expert Malaravan Ponniah so good at telling if you are lying - even without the machine? And can you beat the machine? Our CNA Insider producer takes a lie detector test.

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