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.
16 Nov 2022 04:14pm
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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