If somebody invented smart glasses that detected lying, how do you think the public would react?

Can’t speak for anyone else, but every other word out of my mouth in the presence of these glasses would be an intentional lie.

Anarchy in the streets immediately. Imagine how many romantic, professional and social relationships would be tested right away.

Politicians

That's what I was thinking with the social aspect.

they somehow detect willful deception, like people expect polygraphs to do, but with high accuracy

This technology is a fantasy. It relies on the false assumption that their are detectable, reliable, and measurable physiological differences between bodies that are lying and bodies that are telling the truth.

Polygraphs aren't unreliable because the technology isn't ready. They're unreliable because the idea that you can physically measure a concept (lying) is logical fallacy. (reification).

Yeah you're not understanding what "hypothetical" means - it means suppose this happens, not asking if it can. Like if I asked how FTL space travel would change our culture, it's the culture part I'm interested in, not the physics being impossible.

Politicians would very quickly ban the thing "for our own security"

Do you know what a thought experiment is

If I look in a mirror, will they detect when I'm lying to myself? Take my money.

Only if you're doing it on purpose.

Can definitely see that happening.

I am trying to tag along with the thought experiment, but I can only imagine it being yet another tech bro scam. Elon Musk will sell Grok lie detector glasses that just fucking guesses, but the press will just keep copy-pasting deceitful press releases until half the people I meet believe the glasses do detect lies.

Many will then start using them in private resulting in both extreme frustration when they hallucinate lies, and unprecedented fashtech surveillance.

Technically, shouldn't the fact that brain activity ultimately has a physical basis (various chemical and electrical signals moving around and such) imply that, if a person lying knows they're lying, there should be some physical difference between that brain and the brain of an otherwise identical individual saying the same thing, but believing it to be true? Measuring that and interpreting the data might be an impractically difficult problem to solve, sure, but if there truly were no physical difference, that would have to imply that at some level, thinking is a supernatural process that at least partly occurs outside the physical universe, which is both something no evidence exists for, and would seem in contradiction to things we do observe, like how damage to the brain changes and impairs a person's thinking

Might be a problem with narcissists who believe their own lies?