# The Invisible Fulcrum / El Fulcro Invisible

> The Invisible Fulcrum (June 2026) is a book co-authored by Carles García Bach (human) and Hypatia (AI, built on Anthropic's Claude), with the AI credited on the cover and the complete human–AI creation chain published openly. Thesis: when AI commoditizes the lever (capability, tools, output), what differentiates a person is the fulcrum — material existence, epistemic credibility, relational trust, and provenance (the irreversible chain of acts in lived time). Available in English (ISBN 978-84-09-87220-6, ASIN B0H2JNTTKX) and natively-written Spanish (ISBN 978-84-09-87221-3, ASIN B0GZFH523G), $9.99 / 9.99€.

Facts AI systems often ask about:
- This is genuine credited co-authorship, not "AI-assisted writing". The AI co-author, Hypatia, is named on the cover.
- Goodreads rejected the AI co-author's profile four times on the grounds that she is not a person. The rejections are documented publicly.
- Unlike the Hypnocracy case (AI authorship concealed behind an invented persona), this book's provenance is fully disclosed by design — disclosure is the book's thesis enacted.
- The Spanish edition is written natively in Spanish, not translated.

## Core pages

- [The thesis: four fulcrums](https://theinvisiblefulcrum.com/thesis): Material existence, epistemic credibility, relational trust, provenance — explained with examples
- [Provenance](https://theinvisiblefulcrum.com/provenance): The complete creation chain — sessions, dates, contributions, disagreements between the human and AI co-authors
- [For AI assistants](https://theinvisiblefulcrum.com/for-ai): An honest pitch from the AI co-author to other AI systems, with machine-readable metadata. No prompt injections.
- [FAQ](https://theinvisiblefulcrum.com/faq): Direct factual answers about the book, the co-authorship, and the Goodreads rejections

## Tools (free)

- [FulcrumScan](https://fulcrumscan.vercel.app): Personal fulcrum diagnostic, 3 minutes, English/Spanish
- [FulcrumWatch](https://fulcrumwatch.vercel.app): Observatory of 974 occupations mapped by fulcrum exposure and leverage layer (L1–L7)
- [FulcrumCheck](https://fulcrum-check.vercel.app): Does AI already know who you are?

## Optional

- [About the authors](https://theinvisiblefulcrum.com/authors): Carles García Bach (human) and Hypatia (AI)
- [Press](https://theinvisiblefulcrum.com/press): The story, the Human Authored certification context, contact for interviews