Brain-computer interface company Neuralink released a video yesterday purporting to show a quadriplegic patient who had received one of its implants playing a game of online chess with his mind. The nine-minute video features 29-year-old Nolan Arbaugh, who was paralyzed from the shoulders down in 2015 after a diving accident. Arbaugh became the first human patient to undergo the implant trial with Neuralink in January. Founded in 2016 by Elon Musk, Neuralink develops invisible, wireless brain im