This short article reports on a paywalled Nature paper from a few months ago. The system in question doesn't translate all the man's thoughts, but only those specifically directed toward making hand motions as though he were writing. "Electrodes implanted in his motor cortex recorded signals of his brain activity, which were then interpreted by algorithms running on an external computer, decoding T5's imaginary pen trajectories." This is consistent with other direct neural interfaces; you can't directly read 'thoughts', but you can communicate with sensory and motor neurons that input and export those thoughts.
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