Here's a previous explanation (sorry for the gross analogy!) - https://news.ycombinator.com/item?id=27000504 https://news.ycombinator.com/item?id=27000504 It w

Here's a previous explanation (sorry for the gross analogy!) - https://news.ycombinator.com/item?id=27000504 https://news.ycombinator.com/item?id=27000504 It was mixed in, which probably made it worse.