You're likely aware of it, but in case others aren't, there's a classic online presentation that makes the same case: https://betterexplained.com/articles/a-vis

You're likely aware of it, but in case others aren't, there's a classic online presentation that makes the same case: https://betterexplained.com/articles/a-visual-intuitive-guide-to-imaginary-numbers/ https://betterexplained.com/articles/a-visual-intuitive-guid... And here's some "ancient" HN commentary on that article: https://news.ycombinator.com/item?id=2712575 https://news.ycombinator.com/item?id=2712575