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there are a few good ways ome is to see if they are sweating another is to see if there heart rate went up, look down or away from your eyes, pause to much or just pause, another that i know of is that they seem to be afraid mainly of getting caught, keep in mind that some people are good at it.
1. If they are smiling then they are lying, only if it seems to you its fake 2.Look in there eye deeply and if it twiches then there lying and if it doesn't twitch there telling the truth but if it twtches in the right you wont know.

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7y ago

What else can I help you with?