CestusAI

Act IThe mirror

You already know what you think.You came here to find out if you are right.

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Act IIThe reframe

Every tool you have used was built to hand you an answer.None were built to help you form one.

Act III

Where you decide.

CestusAI

Getting it right matters. Knowing what you stood on when you decided matters longer.

CESTUSAI · THE WORKSPACE

Three taps. Then it answers.

This is where you decide.

Your conviction, moving

sits at 0.50

Feeling

What weighs

What you need

The answer

The last time you had a big decision to make, what did it feel like?

LensesResearchDevil's AdvocateVerifyCompareSimulate

What you just ran was one lens.

There are five.

CESTUSAI · THE FIVE LENSES

Five ways to ask.

One question, five lenses.

Most tools answer with one voice. This one lets you swing through five, and the right lens depends entirely on the kind of decision you are carrying. Pick the lens, the answer shape changes.

Lens 01

Research

A balanced read of what is known.

Reach for it when the field is wide and you want the lay of the land before you take any position.

What asking it sounds like

“What does the evidence on intermittent fasting actually say?”

Three peer-reviewed meta-analyses. Two converge on the mechanism, one diverges on long-term sustainability. Plain language, with the receipts.

What comes back

Three solid sources agree on how it works. One disagrees on how long it lasts. We leave the disagreement in, instead of smoothing it over.

[1]The big 2024 review
[2]A study that redid it with 2,140 people
[3]The one paper that disagrees

Lens 02

Devil's Advocate

The strongest honest case against you.

Reach for it when you have already made up your mind, and you want to make sure your mind is worth keeping.

What asking it sounds like

“I am about to launch. Argue against me.”

Here is the version of the post-mortem written six months from now, in your own voice, if this fails. The two assumptions you have not actually tested are these.

Lens 03

Verify

One claim, checked against the record.

Reach for it when a single fact is doing too much of the work.

What asking it sounds like

“Did the report actually say what they said it said?”

The original source says this, on page fourteen. The summary you read paraphrased it in a way that changes the conclusion. Here is the difference, side by side.

Lens 04

Compare

Two options against a rubric.

Reach for it when you have narrowed it to a fork, and you want a rubric you can defend.

What asking it sounds like

“Option A or Option B, on the criteria that actually matter to me.”

A scores higher on three of your stated criteria. B scores higher on one. The one criterion you never wrote down but always behave by is closer to B.

Lens 05

Simulate

The counterfactual you cannot run twice.

Reach for it when you want to see the version where you chose differently, before you commit.

What asking it sounds like

“If I had taken the offer last year, where would I be now?”

Tracked against the available comparables, your trajectory in that path looks like this. The thing you would have gained, and the thing you would have lost, named honestly.

You can also let Cestus pick. Auto-routes each question to the lens it deserves, and tells you which one and why before it answers.

CESTUSAI · YOUR JOURNAL

And it remembers.

Every decision you make lives here.

Each decision keeps its own trajectory. Come back in a month, see how your conviction actually moved, and whether the reason you decided still holds.

Your Journal·4 decisions open

Sort: Recent ↓

DecidedCompare6 weeks ago · 7 sessions

Where should we buy our first place?

Three neighborhoods cleared the bar. The corridor had better transit access and the price-per-sqft held under stress. The one you kept second-guessing had higher upside but required a five-year hold you never actually wanted.

Key beat

The reason you kept hesitating was not the neighborhood. It was the commitment length.

Conviction arc

conf · 0.81Closed loop

Leaning

Which city should I try next?

Three cities clear the bar. One has the weather you would choose.

0.67

Research3× · 2 weeks ago

Reconsidering

What is the project of my life?

Two of four still warm. The one with teeth keeps changing.

0.48

Devil's Advocate12× · 3 months ago

Researching

Where in the world do I want to go next?

Reading my own shortlist honestly for the first time.

0.55

Simulate1× · 4 days ago

CESTUSAI · GET ACCESS

Access is opening, selectively

Answers tell you what to think.Cestus helps you decide.

One email when we open access more widely. No drip campaign, no tracking pixel, no third party we do not name on this page. Unsubscribe in one click.

CestusAI