> generally when you sum together a lot of random variables following a specific distribution you end up with basically the same distribution (scaled by the N r

> generally when you sum together a lot of random variables following a specific distribution you end up with basically the same distribution (scaled by the N random vars). So a lot of sigmoids put together (e.g. covid spread) will still eventually be a sigmoid. I haven't studied statistics very much, but I'm fairly sure the https://en.wikipedia.org/wiki/Central_limit_theorem https://en.wikipedia.org/wiki/Central_limit_theorem says something a bit different from that!