You know that gut feeling that someone isn’t telling you the whole truth? Maybe a friend gave you a sketchy excuse, a partner seemed a little too defensive, or a coworker’s story just didn’t add up. 

Liars don’t always come with a blinking red sign on their forehead. They can be smooth, convincing, and sometimes even believe their own lies. But you don’t need to be a detective or a mind reader to spot a liar. 

With a few simple techniques, you can catch deception in seconds. People reveal the truth through their body language, voice, and the way they construct their sentences. If you know what to look for, you can spot the red flags before you fall for the lie.

So, how do you do it?

1. Watch their eye movements

The eyes are the first place to check when you suspect someone is lying.

Quick test: Ask the person a simple question you know they’ll answer truthfully, then observe their eye movements. When you ask them something suspicious, compare their reaction, if their eye behaviour suddenly changes, you’ve caught a red flag.

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2. Pay attention to how they answer questions

A liar’s words often expose them—they either say too much or too little.

Try asking the same question in different ways. Liars struggle to stay consistent. If their answers start to shift, they’re probably hiding something.

3. Observe their body language

When someone lies, their body often betrays them. Even if their words seem convincing, their subconscious movements may tell a different story.

Look out for:

Casually mirror their body language and see if they naturally mirror you back. Honest people do this subconsciously, while liars stay stiff or act unnaturally.

4. Listen for changes in their voice

Even the best liars struggle to keep their voice steady when telling a false story.

Here’s what to listen for:

Try changing the subject quickly. If they instantly relax or sound relieved, it means they were under stress while answering your previous question—possibly because they were lying.

5. They try to shift the focus away from themselves

Liars don’t like being in the hot seat. When caught, they’ll often try to redirect attention or get defensive.

Watch out for:

Ask them a neutral question about the same topic without accusing them. If they still get defensive, it’s a sign they have something to hide.

6. Look for microexpressions

Microexpressions are tiny facial expressions that last less than a second—and they often reveal the truth before someone can hide it.

Common microexpressions that signal deception:

Now that you know the signs, how many lies have you missed in the past?

Next time you’re suspicious, remember:

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