We count page views on our own servers for every visitor, without cookies and without storing IP addresses. That does not change whatever you choose here.

With your consent we also set one first-party cookie, named pv: a random identifier, kept for 12 months. It lets us count unique and returning visitors and keeps you in the same version of a page while we compare two versions. It is sent only to this site, and nothing is shared with third parties. Your choice itself is stored in this browser's local storage, which is necessary to remember and honour it. You can change your mind at any time with “Privacy settings” at the bottom of every page; declining or withdrawing deletes the cookie.

What our servers keep from the identifier: it is hashed and added to daily statistical sketches (HyperLogLog) that can report how many distinct identifiers they hold but cannot list them. No identifier is stored in readable form or written to a log. Withdrawing deletes the cookie and stops future counting; sketches already written cannot list or reveal the identifier, cannot have one entry removed, and expire after 400 days.