Poker Tells of Socipathic Liars

Most liars have a "tell". The basics are known to all and sundry. Shifting eyes, drop in voice, upper lip sweat.  But serious Sociopathic liars - their tells are harder to see and define.  You have to be around them all the time.

With my father,  it was quoting the exact date of something he read. You would question a comment he made (like "California makes so much cheese, they have to send it to refrigerators in Wisconsin.") and he would say, "No, I read it in an article in Time Magazine."

But then came the tell, if you said something like, "really?"

"Yes," he would say, "March 17th's issue."

That was his tell. The more exact his lie was, the bigger the lie.
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Trump's tell used to be quoting his "friend" John - who never existed.

Now it is the comment "I have proof". That is his tell that he is lying.