The Lloyd Aquifer is the deepest and oldest of Long Island's aquifers. It is a sand and gravel formation ranging in thickness from zero to five hundred feet. At its deepest, it is 1,800 feet below the surface. The water contained in the Lloyd aquifer is about six thousand years old.
But are they actually admissible in court? Courts don't have to admit lie detector tests, according to a U.S. Supreme Court case that specifies how courts deal with scientific evidence. Instead, individual judges have discretion to decide if a polygraph will be admitted based on certain criteria.
This can be used to match paternity or for criminal prosecution, etc. DNA testing if done correctly is very much effective and can discriminate a sample to odds of 1 in 6 billion. Which pretty much is a certainty for criminal court.   I know it is really simplified, but it is a start.