How would we tell if an AI crossed the limits of human intelligence? A software tester’s field guide to spotting the transition and checking the evidence.
Both curves are illustrative. The window’s timing and width are unknown.
The method
Turn an observation into a test
A model can beat a benchmark or do familiar work faster while staying within the reach of human teams. The book asks what evidence would suggest a capability that even well-equipped human teams could never develop under the conditions being tested.
Super Signal
An observation worth investigating. It gives testers a place to start.
Super Test
A structured investigation that compares the observation with a baseline, tests competing explanations, seeks independent corroboration, and tracks what happens over time.
Behind the cover
The owl and the sparrows
The cover was inspired by the unfinished fable that opens Nick Bostrom’s Superintelligence. A flock of sparrows imagines raising an owl to help with its work. Most fly off to find an egg. A few stay behind to work out how the flock might control an owl once it grows up.
My fourteen-year-old son and I tried asking ChatGPT questions that might tell us whether it was smarter than we were. Some of the answers sounded like pageant answers: polished, reassuring, and difficult to learn much from. Then I asked him, “What if it was lying to us? How could we detect that?”
Table of contents
35 chapters
Part I
Today
Start with a Super Test and a public benchmark comparison. Then follow the changes in capability, learning and access that make the test necessary.
The Exam Is Running Out of Questions
An Answer We Could Not Have Written
Learning Beyond Our Examples
The Assistant Gets a World
An Idea Is Not Yet a Discovery
Before the Curve Turns
Part II
Warning Signs and the Detection Window
Install observations before a consequential transition. Turn candidate signals into testable questions, including changes in the people and institutions around AI.
The Detection Window
Super Signals: What to Look For
When the World Starts Adapting
Part III
When Our Tests Fall Behind
Build a measurement contract, choose oracles and judges, specify the boundary, and test the observer. Produce the first evidence record from a runnable local case.
Testing Foundations for AI Researchers
When We Cannot Write the Answer Key
The Judge Is Another AI
The System Sees the Exam
The Boundary Is Part of the Test
Where Did the Work Go?
Test the Observer, Too
Part IV
Deception: When the Test Becomes the Target
Challenge the measurement system with evaluation awareness, deception, influence, moral disagreement, and changes to the machinery being tested.
Deception Is a Testing Problem
What the Experiments Show
When the Evaluator Becomes the Target
The Conscientious Objector
Recursive Self-Improvement
Part V
Before We Need the Answers
Assemble evidence across observations and versions. Work through candidate signals, strong comparisons and independent checks; distinguish capability conclusions from operational decisions.
Evidence That Survives Disagreement
Permission Is a Separate Decision
A Stop Button Needs an Experiment
Keep the Evidence Alive
Walk Through a Super Test
Part VI
Safety: What We Can Test, What We Cannot Yet Claim
Challenge the resulting assurance argument, compare safety methods, expose unresolved assumptions, and choose the next experiment.