File 00 — the thesis
The goal is not certainty.⌃ better uncertainty.
A field guide for thinking when you don't know — and acting anyway. Hold a belief as strongly as the evidence allows. No stronger.
File 01 — the problem
We are bad at uncertainty.
We mistake feeling for evidence, overweight a single signal, ignore base rates, and treat panic like intuition. Every one of these is a sentence the brain writes too fast — and then has to cross out.
- A client goes quiet for three days.The deal is dead probably just busy.
- Zero downloads by noon.Nobody wants this it's noon.
- One odd symptom.It's something serious usually it's nothing.
- One curt text back.They're done with me they slept badly.
The method
Four moves before you panic.
Not a mantra. A correction routine. Run it the next time a single data point tries to write your whole story.
the full field guide →- 01
Name the belief
What do I actually think is true right now? Say it in one sentence.
- 02
Check the base rate
How often does this kind of thing happen anyway, before I look at today?
- 03
Weigh the evidence
Is this a strong signal, or just loud noise that feels like one?
- 04
Update, don't collapse
Move your estimate. A little. Not all the way to the worst case.
File 03 — the one tool that matters
The Panic-to-Probability Converter.
Name the fear. Answer four questions about your prior, your sample size, and whether anything actually changed. It crosses out the catastrophe and writes in a calmer reading of the evidence.
convert a panic →Specimen
My app is dead.
⌃mostly a loud feeling on thin evidence.
Things you can break.
Small instruments that make one idea obvious by letting you push it around. Drag the sliders.
- Panic-to-Probability ConverterTurn a 2 a.m. fear into a number.open →
- Your Risk, in MicromortsWhere the danger actually is.open →
- Dread vs. DataThe things you fear vs. the things that get you.open →
- How Common Is It, Really?Recognize what's actually frequent — and what just feels it.open →
- The Base-Rate MachineWhy a positive test usually isn't.open →
- Signal vs. NoiseOne bad day, drawn out.open →
- The Belief UpdaterMove your mind the right amount.open →
- The Calibration GameAre you as sure as you think?open →
Four things to get better at.
Every essay, scenario and tool is filed under one of these.
- 01ProbabilityBase rates, Bayes, expected value, regression to the mean. The math your gut skips.
- 02PanicCatastrophising, negativity bias, emotional evidence. Why a strong feeling is not a strong proof.
- 03JudgmentDecisions under uncertainty. One bad day is not a trend. Small data drives you mad.
- 04BeliefsUpdating, confirmation bias, motivated reasoning. Keep your convictions on a short leash.
File 04 — from the essays
- Your Brain Hates Base RatesYour gut reads one loud signal and skips the only number that matters — how common the thing was before today.5 min →
- The Volume Knob and the Wrong DialYour alarm is tuned to scream at toast so it never misses a fire — which makes it terrible at telling you how likely the fire actually is.4 min →
- One Bad Day Is Not a TrendTiny piles of data feel like prophecy. Mostly they are just weather.5 min →
- Keep Your Beliefs on a LeashConvictions are fine. Letting them run loose into traffic is the problem.5 min →
File 02 — try a scenario
You sent a client the proposal four days ago. Nothing. No reply, no read receipt, no 'thanks, looking now.' You have rewritten the follow-up email in your head about nine times. Each draft is more anxious than the last.
take your guess →