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> I'd probably answer I knew the word "degauss" but if I had to explain what it physically is, I'd struggle.

It's a button on old monitors.

That's all I know about it. It sounds like it undoes something magnetic-field related, but I have no clue what.



That's pretty much what I'd know about it, too. IIRC its supposed purpose was to fix distortion on CRT displays caused by, uhm, probably something magnetically related. Exactly the level of "knowing" where I'd feel ambivalent.




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