Cookie and local storage policy
Effective and last updated: 3 November 2026
Cookies and local storage let a browser remember information. We use essential storage for your choices and requested features. Optional analytics and YouTube are separate, off-by-default choices.
You can accept, reject or withdraw optional consent at any time. Rejecting optional services keeps the website usable.
Storage used by this website
| Name and provider | Purpose | Duration and choice |
|---|---|---|
vcesr-consent-v1VCESR local storage | Consent categories, time and policy version. No unique visitor identifier. | 180 days; essential to remember your choice. |
vcesr-retro, vcesr-motion-paused, vcesr-themeVCESR local storage | Simple layout, animation and colour theme preferences. | Until changed or cleared; a function you request. |
dilemma.notebook.v1, dilemma.custom.v1Dilemma local storage | Your saved experiments and custom model. Stored on your device, not uploaded by the app. | Until removed or cleared. Export before clearing if you need a copy. |
_ga, _ga_SK69054DYTGoogle Analytics first-party cookies | Distinguish consented visits and maintain measurement state. | Up to 60 days from creation, without automatic renewal; only with analytics consent. |
| YouTube player storage Google / YouTube | Playback state, security and provider processing when a video is started. Provider storage can include session or persistent identifiers. | Only after you allow playback. Names and lifetimes are controlled by Google and may depend on sign-in, browser and interaction. See Google’s linked policy. |
Video cover images are served locally. Merely viewing a cover does not connect to YouTube. The privacy-enhanced player domain does not prevent all personal-data processing when you play a video. Google’s cookie information describes its storage and controls.
Making and withdrawing a choice
“Reject optional” disables both analytics and embedded video consent. “Accept optional” enables both. Choose settings to enable them separately. With a Global Privacy Control or Do Not Track signal, analytics stays off and the accept action allows videos only. Consent is remembered on this browser for 180 days and is requested again after expiry or a material policy change.
Withdrawing analytics consent disables measurement, removes this integration’s accessible analytics cookies and reloads the page to unload the library. Withdrawing video consent removes embedded players. Your choice is synchronized across tabs on the same origin. If browser storage is blocked, your choice applies to the current page and may be requested again on another page.
Withdrawal cannot undo data already transmitted. Google’s own cookies and storage on its domains cannot be cleared by VCESR; use Google’s controls or your browser to remove them. You can request deletion of personal information through Your privacy choices.
Browser controls and other services
You can block or clear cookies and site storage in your browser. Clearing all VCESR storage also removes display settings and locally saved Dilemma notebooks. External stores, checkout services and product deployments have their own storage practices. Read the privacy policy for purposes, legal bases, providers, transfers and rights.