Musk makes big claims with little detail, and announcing on Twitter that Neuralink implanted a brain-computer interface into a person “is maybe the biggest example of that.” Here's what we do & don't know, from actual BCI experts https://www.scientificamerican.com/article/elon-musks-neuralink-has-implanted-its-first-chip-in-a-human-brain-whats-next/