Cory Doctorow's Essay on Rare Events

I was following links from someone's Twitter account of the seminar I'm attending and fell into this essay:

The single most pernicious threat to liberty today is humanity's natural tendency to misunderstand the statistics of rare events. We're just not wired to have good intuition about things that happen with extreme infrequency.

A great, fast read that I find applicable to a subject that I have no dared return to recently, childhood immunizations. Cory Doctorow is well known in on-line nerd circles (iirc, he released some fiction works in open source). Thanks to Trevor over at