There is no evidence to support the notion that all brains are configured the right way. To move your left finger, we’d need to know which motor neurons are hooked to your left finger. Knowing which motor neurons are hooked to my left finger isn’t much help. They might be in a similar region for motor hand control, but there are no guarantees.
To control useful, higher level thought processes, like political opinions, would be even harder. There isn’t a single “political thoughts” part of the brain, like there is for motor control, so the variation from person to person is even larger.
Really advanced control, like the sci-fi alien that controls someone’s speech, is a topic we don’t even have theories for.
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