“Mind-reading” neural decoders could spell the end of privacy. But the full ramifications of this technology are even more concerning. FOR CENTURIES, MENTALISTS astounded crowds by seeming to plumb the depth of their souls—effortlessly unearthing audience members’ memories, desires, and thoughts. Now, there’s concern that neuroscientists might be doing the same by developing technologies capable of “decoding” our thoughts and laying bare the hidden contents of our mind. Though neural decoding has been in development for decades, it broke into popular culture earlier this year, thanks to a slew of high-profile papers. In one, researchers used data from implanted electrodes…