As I understand it, the premise of this program is that people have certain things they do (sometimes called "tells") that show that a certain kind of deception may be occuring. Is that correct?

Then we're told that these things are involuntary and people cannot stop doing them. Is that correct?

If so, then why is a description of such things SSI? As I understand SSI, it relates to information that can be used to subvert security systems. But if this is involuntary, then knowing about them can't stop them. Right?

But if that's true, then how is the information legally SSI?