I understand what you're saying about interrogation clues. I missed that. So, thanks.

Maybe I'm being too close minded/critical/harsh. But I've had one interrogation run like this

Looking down/looking away - Lie
Looking away/wandering eyes - Lie
Looking down/looking away - Truth

The first two were easy because the statements were false. But the third one was just: "I can't remember what happened yesterday".

Don't have evidence to disprove that she doesn't remember, so I go with doubt. But of course it isn't that. It's the truth.

Stuff like that really bothers me. It feels inconsistent. And makes me not trust the "face reading" system.