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> Unobtanium

I think you mean Unununium.

Unobtanium is fiction from the movie Avatar lol

Notoriously bad exposition I might add ("This is unobtanium. This is what we're here for!").

Unobtanium was a thing in fiction long before Avatar.

unobtainium predates Avatar https://en.wikipedia.org/wiki/Unobtainium

and at least that exposition makes more sense then the "fountain of youth brain juice" in the sequel, when the humans can literally reincarnate themselves without having to cross interstellar space to do it.

My physics teacher in high school used unobtanium in class and was the first I recall using it. This was way before Core or Avatar. After reading your wiki link, it fit perfectly with the definition of a frictionless, massless pulley use.

It's funny, because I'm one to use movie references in casual conversation like it's nothing, yet my use was definitely not in this case

Avatar was a famously wrong use of the very old term for something that is (no longer) available anywhere.

America is named after some author writing about a "New World." America is sometimes erroneously used to refer to only one of the states instead of the whole continent.

Einstein doesn't tell me anything, unlike Müller (miller) and Schmied (Schmiede = Forge)