zitterbewegung gives another source at https://news.ycombinator.com/item?id=12892733 https://news.ycombinator.com/item?id=12892733 . (If a questionable site is

zitterbewegung gives another source at https://news.ycombinator.com/item?id=12892733 https://news.ycombinator.com/item?id=12892733 . (If a questionable site is the only source you can offer, then surely at least a warning is in order?)