It’s rudimentary but demonstrates quantitatively how probabilities favoring one origin scenario or another can be reached. Easy to copy-paste it so any set of priors can be applied and collectively estimated,
If you click the time code (“one day ago”) to get the comment on its own page, you should see a “favorite” hyperlink, this will add the comment to a list of your favorites, the link to which is at the bottom of your own profile page. Took me a few years of HN to notice it.