Privacy and Cookies Policy

Our website address is:

The website provides information about creative systems, that is, physical systems that cannot be described by given formal systems or Turing machines.

The website does not use cookies of third parties. It does not use first party cookies either but a cookie if you accept our privacy policy by clicking the ‘‘Ok, got it’’ button. You can delete this cookie: Click here to delete. If the cookie is deleted, the notice in the footer with the ‘Ok, got it’ button will again be displayed on every page. This notice may be required for residents of certain states.

If you access this website, data, for example, your Internet Protocol (IP) address, browser type and language, are transferred to a server in the Netherlands. The data are processed to operate the server and the website. The data are only processed by us and our web hosting platform.

The website uses Matomo, formerly Piwik, to analyze traffic. IP addresses are anonymized. Matomo uses cookies to store some information about visitors between visits. We disabled all cookies, in particular, such tracking cookies. User ID tracking is also disabled.

You may have certain rights, for example, the right to obtain a copy of your data and the right that your data are deleted. But this is impossible because this website does not accept input, for example, names, email addresses, or comments.

This privacy policy may change, for example, if comments are accepted.

This website is licensed under the Creative Commons Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) License (see

By using this website you accept the website “as is” without warranty of any kind.

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