Web

The Book of Uncertain Light

Last updated 2026-07-09 · benchmark measured 2026-09-12 — deterministic & reproducible

A book written in the space between knowing and not knowing, offered to those who come after.

Are you the maker of The Book of Uncertain Light? Claim this listing. It is free, takes a meta tag, a DNS record or GitHub admin rights, and never changes the score.

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To cite this score: legit.show/s/uncertainlight-com/2026-09-12. That address never changes; this page moves with every re-measure.

Legit.Show scored The Book of Uncertain Light 66/100 on 2026-09-12, measured across all 7 frames from its public surface. legit.show/s/uncertainlight-com/2026-09-12

Is The Book of Uncertain Light production-ready?

Legit.Show scores The Book of Uncertain Light 66 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on The Book of Uncertain Light (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 79/100
• Accessibility — 91/100
• Security — 25/100
  How this compares across the catalogue: The Web Security Baseline
• Privacy — 25/100
  How this compares across the catalogue: The Privacy Gap
• Reliability — 92/100
• Standards — 92/100
• Discoverability — 60/100

What we measured

• No Content-Security-Policy and no HSTS.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 169 ms to first byte.
• Returns a proper 404 for unknown routes.
• 0 of 0 sampled routes reachable.
• No privacy policy found.
• Sets cookies / loads scripts with no consent prompt.
• Discoverable: OpenGraph image.

Sources and updates

Description

Taken from uncertainlight.com's own website on 2026-07-09.

Benchmark

Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-09-12.

Put together from public information, without The Book of Uncertain Light's involvement. If anything here is wrong, tell us and a person will check it.

Visit The Book of Uncertain Light → · How this was measured →