science

So you're worried about governments forcing brain surgery on people, and think this one particular technology is going to be the big issue if that happens?

I think at that point 'reading minds' is no longer the major concern. Like the old statement about apocryphal airport security measures after 9/11 - "if you can take over the plane with fingernail clippers, then you don't need the clippers".

(clippers were never actually banned on planes in the USA, but for a short while the metal files on them were and that caused confusion)

This tech seems like a huge waste of money when if they are That authoritarian they could just shove an ice pick up the dissident's eye socket or simply have them jump out a window with bullet holes in their back. Why bother with actually gathering evidence - if you're willing to forcefully open their skull, then clearly it's already beyond that point.

I suppose it could be used to find accomplices and crack passwords and stuff, but still seems like a very roundabout way of going about it and likely can be easily defeated by just thinking "LA LA LA I CAN'T HEAR YOU" in a loop. Or thinking of an earworm song. Or thinking of false statements.