> But the machine remains useful for extracting confessions. [...] Despite a growing body of evidence, including hundreds of exonerations based on DNA evidence, most people don’t believe in false confessions.

Arguably the bigger/worse false belief right there.

> First the exam makes you doubt or forget your memories. Then, by forcing you to re-access them again and again under stress, it literally rewrites them.

To some extent this happens naturally, so if the questioner really wants accuracy, you won't force people to re-access the memory for no good reason.