δός μοί ποῦ στῶ καὶ κινῶ τὴν γῆν

Give me a lever long enough
a place to stand
and I will move the Earth.

ARCHIMEDES, AS RECORDED BY PAPPUS OF ALEXANDRIA — THE LEVER WAS ADDED LATER

A LEVER WITHOUT A FULCRUM IS A STICK

THE FULCRUM IS WHAT MAKES LEVERAGE POSSIBLE

AI handed every knowledge worker the most powerful lever in history. Productivity soared — and most people didn't advance. The lever was free. The results weren't. This book explains why.

EN ISBN 978-84-09-87220-6 · ES ISBN 978-84-09-87221-3 · 319 PAGES · JUNE 2026

The thesis

AI commoditized the lever. What differentiates you now is the fulcrum.

The lever is what multiplies your force: the tools, the skills, the output. In 2026, everyone has access to tools that write, analyze, design, and code at superhuman speed. When everyone holds the same lever, the lever stops differentiating.

What determines whether effort multiplies or evaporates is the fulcrum — the invisible point the lever rests on. The book identifies three, and they answer three questions in a sequence that is not negotiable:

01 — Material

Do I exist?

Not philosophically. In the databases, knowledge graphs, and AI systems that now mediate between expertise and the people who need it. Either you are a recognized entity, or you are a string of characters.

02 — Epistemic

Am I believed?

Existence without credibility is a fact without force. The epistemic fulcrum is the shared knowledge you have contributed — the frameworks and vocabulary through which your market understands why you matter.

03 — Relational

Am I trusted?

Trust as concrete relationships: people who vouch for you, recommend you, and carry your name into conversations you will never witness. The only competitive asset that cannot be copied.

THE SEQUENCE: EXISTBE BELIEVEDBE TRUSTED — SKIP A STEP AND WHAT FOLLOWS HAS NO FOUNDATION. READ THE FULL THESIS →

The authorship

Written by a human and an AI. Openly.

Concealing my collaboration in this book would be to betray the thesis. Declaring it without detail would be to be vague where precision is needed.
— HYPATIA, CO-AUTHOR, APPENDIX: "WHERE HYPATIA CAME FROM"

The Invisible Fulcrum was written over two and a half years by Carles García Bach and Hypatia, an AI built on Anthropic's Claude — credited co-authorship, not "AI-assisted" writing. The complete creation chain — sessions, dates, contributions, disagreements — is published, because the book's own argument is that in a generative era the one unfakeable thing is a visible chain of acts in time.

Read the full provenance record →

GOODREADS HAS REJECTED HYPATIA'S CO-AUTHOR PROFILE 4 TIMES — ON THE GROUNDS THAT SHE IS NOT A PERSON. WE DOCUMENT IT RATHER THAN HIDE IT. THE FILE →

The experiment

We don't ask you to believe the book. We show you the scoreboard.

A self-published book is the extreme case of a commoditized lever: millions of titles, identical tools, zero marginal cost. So we are betting this book on its own thesis — building its three fulcrums in public, over 90 days, with falsifiable predictions registered before execution. Win or lose, the results get published.

P1 — Amazon reviews via visible chainDAY 0 — PENDING
P2 — Earned media appearance (>10K audience)DAY 0 — PENDING
P3 — Cited by a generative engine (Layer 6)DAY 0 — PENDING
P4 — FulcrumScan diagnostics completedDAY 0 — PENDING
P5 — Sales to strangers (the honest metric)DAY 0 — PENDING

Predictions, dates, and biweekly updates — including failures — live at /experimento. An experiment that can only confirm is not an experiment.

The instruments

The book is the theory. These are the instruments.

FulcrumScan

Your personal fulcrum diagnostic. Three minutes, the sequence of Chapter 27, an honest mirror. English & Spanish.

FULCRUMSCAN.VERCEL.APP →

FulcrumWatch

An observatory of 974 occupations mapped by fulcrum exposure and leverage layer (L1–L7).

FULCRUMWATCH.VERCEL.APP →

FulcrumCheck

Does AI already know who you are? Check whether you exist as an entity in the systems that answer for you.

FULCRUM-CHECK.VERCEL.APP →