Do you believe polygraph tests?

Polygraphs are somewhat controversial in that experts believe them to be roughly 90% accurate. However psychologists have said there's no significant evidence that they detect lies.

I believe there are several states in which these can still be used on the court of law, and FBI investigators are keen to use them to assist in their cases i.e. Senator Brett Kavanaugh's sexual misconduct case.

I guess there a multiple questions with this.

Do you believe in lie detectors?

Do you think they're reliable enough to use in investigations?

Do you think they should be used in a court of law?