You, DecodedGet your Core Read

How it works

How You, Decoded was built

An honest account of what's under the hood — including the parts I can't claim.

I get asked how this thing works. Fair question — there's a lot of nonsense in this space, and you should want to know what you're actually getting before you trust it with anything that matters.

So here's the whole answer. Not a sales page. The actual method, where each piece came from, what I'm certain about, and — just as important — what I'm not.

How to read this. Each section gives you the precise version first, then a box marked "What this actually means" that says the same thing in plain English. Read whichever one you like. They say the same thing.

I've listed my sources at the end of each section so you can check me.

THE SHORT VERSION

Your assessment is built from four calculation systems plus a set of questions I wrote myself.

The astronomy runs on the same planetary data NASA uses to navigate spacecraft, so the positions in your chart are exact and you can verify them anywhere. Then I look for the places where systems built centuries apart, on different continents, by people who never met, happen to say the same thing about you.

That agreement is the whole point. Where the systems disagree, I tell you. And anything I can't calculate, I don't pretend to — I either ask you, or I label it as my best read for you to confirm or throw out.

PART 1 — THE FOUR SYSTEMS

1. BaZi — the Chinese Four Pillars

What it is

BaZi — the name means "eight characters" — records the exact moment you were born in the Chinese sexagenary calendar. That calendar pairs 10 Heavenly Stems with 12 Earthly Branches, cycling through 60 combinations before it repeats.

Your birth produces four pillars — year, month, day, hour — each carrying one stem and one branch. Four pillars, two characters each: eight characters.

One of those eight matters more than the rest. The stem of your day pillar is your Day Master — the character that stands for you. Everything else in the chart is read in relation to it: what supports you, what drains you, what you're missing entirely.

Each stem and branch carries one of five elements — Wood, Fire, Earth, Metal, Water — so your eight characters produce an elemental balance, and each element takes a role relative to your Day Master.

Where it came from

The calendar itself is genuinely ancient, and this part is archaeology rather than tradition. The sexagenary cycle appears as a way of recording days in the earliest Chinese writing that exists — Shang dynasty oracle bone inscriptions from about 1250 BCE. Nearly every oracle bone carries a date in this format. Its use continued through the Zhou dynasty and into the Han. [1]

That's roughly 3,200 years of continuous, documented use.

Reading a person's character from that calendar is much younger, and I want to be precise about it. It was systematised in two steps: Li Xuzhong (Tang dynasty, 618–907 CE) built a method around year, month and day, and established the principle that your birth day stands for you. Xu Ziping (Song dynasty, 960–1279 CE) added the fourth pillar — the hour — and made the Day Master the centre of the whole reading. The orthodox method still carries his name: Ziping BaZi. [2]

What this actually means

The Chinese have a calendar that works like a clock with 60 numbers on it instead of 12. It has been running without a break for about 3,200 years, and we know that for a fact because archaeologists dug up bones with the dates carved into them.

Your birth gets four "stamps" from that calendar — year, month, day, hour. Two characters each, so eight in total. That's what BaZi means.

One of those eight stands for you. It comes from your birth day, and it's called your Day Master. Everything else gets read against it.

Now the honest part, because you'll hear other people get this wrong: the calendar is 3,200 years old. The idea of using it to describe a person is about 1,000 to 1,400 years old. Two Chinese scholars built that up, centuries apart. I'd rather tell you the real numbers than the impressive ones.

A note on sources: English-language scholarship on Li Xuzhong and Xu Ziping specifically is thin. The dynastic dates are solid; the attributions come from the tradition's own account of itself. I'd rather say that plainly than dress it up.

Sources

2. Your Western birth chart

What it is

Your natal chart records where the Sun, Moon and planets actually were along the ecliptic when you were born, plus your Ascendant — the degree of the zodiac coming up over the eastern horizon at that moment — and your Midheaven. All of it calculated for your specific date, time, latitude and longitude.

I compute Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, the True Node, the Ascendant and the Midheaven, each to an exact degree.

This is why your birth time matters so much. The Sun moves through one zodiac sign in about a month. The Ascendant moves through all twelve in 24 hours — roughly one every two hours. Two people born the same morning in the same hospital, four hours apart, share a star sign and have a genuinely different chart.

Where it came from

Why the positions in your chart aren't up for debate

I use the Swiss Ephemeris, developed by Dieter Koch and Alois Treindl at Astrodienst AG in Switzerland. It's built directly from NASA JPL's DE431 planetary and lunar ephemeris, and it reproduces that NASA data to within 0.001 arcseconds, across a range of 13201 BCE to 17191 CE. [5]

An arcsecond is 1/3600th of a degree. A thousandth of one is about the width of a human hair seen from 200 metres away.

JPL's ephemerides are the solar-system models NASA actually navigates spacecraft with.

What this actually means

Somebody had to work out where the sun, the moon and the planets were on the day you were born. That isn't a matter of opinion. It's a matter of looking it up.

NASA built the lookup table. They had to. If you're going to fly a spacecraft to Mars, you need to know exactly where Mars is going to be years in advance, or you miss. So NASA's Jet Propulsion Laboratory built an extraordinarily precise map of where everything in the solar system has been and will be.

A Swiss company packaged that same NASA data so software like mine can use it. It matches NASA's numbers to within a thousandth of an arcsecond — like being able to point at a single hair from two football fields away.

So here's something I can say without any hedging: where the planets were when you were born is not my opinion. Those numbers come from the same place NASA's numbers come from. You can check every one of them against any other source in about thirty seconds, and they will match.

There's a real argument to be had about what those positions mean. There's no argument at all about where the planets were. Those are two different conversations, and I'd rather you had them separately.

Sources

3. Your numbers

What it is

Five core numbers, calculated from your full birth name and your birth date: Life Path (from the date), Expression (all the letters of your name), Soul Urge (the vowels), Personality (the consonants), and Maturity (Life Path plus Expression).

Where it came from — and I'm going to be blunt

Number philosophy associated with Pythagoras (6th century BCE) is genuinely ancient. The system I actually use is not, and you deserve to hear that from me rather than find it out later.

The A=1, B=2 letter chart, the birth-number and name-number distinction, vowels standing for the soul's desire, 11 and 22 as master numbers — these were developed by Mrs. L. Dow Balliett, working in Atlantic City from 1908. The word "numerology" was coined around 1912 by Julia Seton Sears. Dr. Juno Jordan, who studied with Balliett directly, built it out further through the 1960s.

It's a product of the American New Thought movement, roughly 1905 to 1930. It borrowed Pythagoras's name and a few of his ideas. [6]

What this actually means

Your name and your birthday get turned into a handful of numbers, and each number carries a meaning.

Here's the thing I want to say before anybody else does: this is the youngest piece of the whole assessment. It's called "Pythagorean" after a Greek man from 2,500 years ago, but the system I use was put together by an American woman in Atlantic City starting in 1908.

Why would I tell you that when I could just say "ancient"? Because it's true, and because you'd find out. If I shade the small claims, you'd be right to doubt the big ones.

And here's what it's genuinely good for. Your numbers are calculated from completely different information than your chart. They don't know your birth time. They don't know where you were born. So when your numbers land on the same theme as your Chinese chart — which never saw your name — that agreement means something. Two sources with nothing in common pointed at the same place. That's not mysticism. That's just how evidence works.

Sources

4. Human Design

What it is, and when it's from

Human Design was created by Ra Uru Hu, born Robert Alan Krakower (1948–2011), following an experience in Ibiza beginning 3 January 1987. It is not ancient. It draws on ancient sources, but the synthesis itself is late 20th century. [7]

It combines four things: the I Ching supplies 64 "gates," the Hindu chakra system supplies nine "centres," the Kabbalistic Tree of Life supplies the channels connecting them, and Western astrology decides which gates are switched on for you.

Mechanically, it uses two moments, not one. Your Personality side comes from the planetary positions at your birth. Your Design side comes from a second moment about three months earlier — the point where the Sun sat exactly 88 degrees of solar arc before its birth position. Gates that pair across a channel make a centre "defined" — running on its own consistent energy — versus "open," where you take in and amplify what's around you. Which centres are defined determines your Type and Authority.

Ra Uru Hu proposed a physical mechanism for this involving neutrinos from the Sun. That proposal is not established physics, and I don't repeat it as though it were.

What I do — and where I stop

I calculate what the astronomy genuinely supports: your Profile and your gate activations, from the birth and design Sun positions.

And then I stop. For your Type and Authority — the two things Human Design people actually care about — I send you to get your official chart from a proper Human Design source and paste the result in. I confirm it. I never assert it.

This is the only thing in the entire assessment that you bring in from outside. Everything else is either calculated or derived here.

What this actually means

Human Design is a system somebody invented in 1987. Not ancient — 1987. I say that plainly because the origin story is the only account there is; there's no outside scholarship on it, and you should know that going in.

The interesting mechanical part is that it uses two birthdays — the day you were born, and a moment about three months earlier. Both get stamped onto your chart.

Here's the part I want you to notice, because it tells you something about how I work. I could have guessed your Type. The guess would have looked completely convincing and you'd never have known the difference. I don't do it, because the guess isn't reliable enough.

I'd rather hand you fewer things you can trust completely than more things you can't.

Sources

PART 2 — THE QUESTIONS I ASK YOU

Your chart is only half of it. The other half is a short set of questions — and those are mine.

Your Core Read uses five of these. The full assessment uses all of them, and asks one of them twice — once at the start of your 90 days and once at the end.

No borrowed tests

There is no third-party personality instrument anywhere in this product. No licensed inventory, no borrowed questions, no trademarked names, no reverse-engineered scoring. I use nobody else's test.

What I have instead is a short structured interview I designed, and the answers get cross-examined against your computed chart. That second half is the part that makes it work.

Why the questions are shaped the way they are

I built them around one problem: people are unreliable narrators about themselves — but they're unreliable in predictable ways. Everyone carries a flattering version of themselves, and that's the version that comes out when you ask directly. If you know how someone will distort, you can design around it.

The questions draw on well-established interviewing practice: structured behavioural interviewing (the finding that asking someone to recall specific events beats asking them to describe themselves in the abstract), motivational interviewing (open questions, and phrasing that assumes a thing exists so you skip the denial), and standard coaching frames that strip fear out of an answer.

What each question is doing

"What do people consistently get wrong about you?" You can't answer this by describing your best self. It forces you to report friction — a place where the world reads you differently than you experience yourself. That gap is where most people's real problems live, and almost nobody volunteers it if you just ask.

"What do you keep starting and not finishing?" Anyone can tell you what they want. Hardly anyone volunteers where they reliably stop. And because you name it yourself, there's nothing to argue with later.

"When you're at your best, what are you actually doing?" Note the word doing. I'm not asking what you're good at — that's a self-rating, and self-ratings are the weakest data there is. I'm asking for a behaviour, in a situation. That's recallable, and much harder to fake.

"What do people always come to you for?" This is the best question in the set. You're not rating yourself here. You're reporting a repeated pattern of other people's behaviour — evidence you merely witnessed. People are unreliable about their own strengths and remarkably reliable about what others keep asking them for. And it's nearly impossible to fake: you either have a stack of memories of people knocking on your door about a thing, or you don't.

"When do you feel most alive — most yourself?" This targets what sustains itself without a reward attached. It's asked separately from the question about what you want in three years, on purpose — so the two can be compared. If they point in different directions, that's a finding, and usually an important one.

"What's the one move you know you've been avoiding?" Read the phrasing again. It doesn't ask whether there's one. It assumes there is, and asks which. That's deliberate.

"If the next 90 days could not fail, what would you attempt?" Most people answer goal questions with a version they've already shrunk to fit what seems realistic. Take failure off the table and you get the unshrunk answer — which is the one worth planning against.

"What will you refuse to tolerate for even one more quarter?" Aspiration is a weak and inconsistent motivator. What you'll no longer put up with is a far more reliable engine.

And one question gets asked twice — once at the start, once at the end of your 90 days. Comparing you to your own earlier answer means more than comparing you to a population average.

The move that makes it work

The questions aren't the instrument. The comparison is.

Your answers sit beside a chart calculated from your birth moment — a chart that knows nothing about what you typed. Two sources with no shared information.

That rule is written into the system, not left to good intentions. One forced "the chart predicted what you typed!" would cost me your trust in everything else on the page.

What this actually means

Every personality test has the same problem: people are bad at describing themselves. Not because they're lying — because everybody's got a flattering version in their head, and that's what comes out.

So instead of asking you to rate yourself, each of my questions is built to get around a specific way people fool themselves.

"What do people always come to you for?" — I'm not asking about your strengths. I'm asking what other people keep doing. You've either got twenty memories of folks knocking, or you haven't. You can't invent that on the spot.

"What's the one move you know you've been avoiding?" — notice I didn't ask if there's something. There always is.

And then the part that actually matters: your answers get put side by side with a chart calculated from the minute you were born. That chart has no idea what you wrote.

When both point at the same thing, that means something — not because it's magic, but because that's how proof works. If two witnesses who never met tell the same story, you start believing the story.

And when they don't match, I'll tell you. That's usually the most interesting page in your whole report.

PART 3 — HOW I MAKE SURE THE MATH IS RIGHT

This is the unglamorous part, and it's where most of the work went.

True solar time

Clock time is a convenience, not the truth. Two corrections are needed to turn the time on your birth certificate into where the Sun actually was:

Together these can shift a birth by three quarters of an hour or more.

What this actually means

Noon on your clock is not noon in the sky.

Everyone in a time zone agrees to use the same clock, but the sun doesn't know about time zones. And because the Earth's path around the sun isn't a perfect circle, the sun also runs a bit early or late depending on the time of year.

Stack those together and the sky can be running 45 minutes off your clock.

Here's why that matters enormously: the Chinese system changes what it says about you every two hours, and at midnight it rolls over to a completely different day. If you were born near midnight and someone uses clock time, they can land on the wrong day entirely — which means the wrong Day Master, which means everything they then tell you about yourself is wrong. And the report would still read beautifully. You'd never know.

I correct for this before calculating anything else. If a free website gave you a different result than I did, this is usually why. Ask them whether they correct for longitude and the equation of time. Most don't.

Historical daylight saving

I don't assume a fixed offset for a city. I look up the offset that was actually in force on your birth date. Daylight saving rules have changed repeatedly — a March 1984 Chicago birth is on standard time, because DST didn't start until 29 April that year. Assume otherwise and you're an hour out, which can move an hour pillar and shift a rising sign by a whole sign.

The math is written twice

The entire calculation exists twice, in two different programming languages, written by two different routes. An automated test checks that both produce exactly the same answer, and the app refuses to ship if they ever disagree.

What this actually means

A math error here would be invisible. Your report would still be well-written, still persuasive, still sound exactly right — and be completely wrong about you. You'd have no way to spot it.

So the only real defence is to make the computer check itself. I wrote everything twice and made the two versions prove they agree. That's a practice borrowed from safety-critical software.

Known-answer tests

I keep a set of charts I already know the correct results for. Every time the code changes, those run again and confirm nothing moved.

The writing can't freelance

The part that turns your chart into readable English isn't allowed to invent meanings. It works from fixed reference tables. Two people with the same Day Master get the same underlying meaning — written differently, to fit their own chart and their own words, but never a different meaning. The writing changes. The facts don't.

PART 4 — HOW I LABEL WHAT I'M SURE ABOUT

Not everything in your report is equally certain, so I tell you which is which. Every single output is sorted into one of three tiers.

Exact math. As accurate as your birth data. Your pillars, your element balance, your planetary placements, your core numbers. Stated plainly: "Your Day Master is Yin Metal."

Convention-dependent. Real, but practitioners differ on the details — when your life eras begin, for instance. Stated with the wobble attached: "You entered this era around 48 — the exact year varies by a year or two between practitioners."

Inferred, or supplied by you. Human Design Type and Authority. Your strengths. Your purpose. Anything psychological. Never asserted — always handed to you as something to confirm or reject: "From your answers you read as… does that land?"

What this actually means

Some of what I tell you is just arithmetic, and I'll say it flat out. Some of it is real but the schools disagree about the details, so I'll show you where the wobble is instead of hiding it. And some of it is me reading between the lines of what you told me — and that never gets stated as fact. It gets handed to you as a question.

You are the one who confirms it. That runs through the whole product.

Certainty sells better. It also breaks the moment somebody checks.

PART 5 — WHAT I DON'T CLAIM

Knowing where I stop is what should make the rest believable.

COMMON QUESTIONS

"Isn't astrology nonsense?"

Two different things get mixed together there. Where the planets were when you were born is astronomy — exact, checkable, and the same data NASA flies spacecraft on. What that means about you is a traditional framework, and I won't claim it's been proven in a lab, because it hasn't. What I'd say is that it's a structured way of looking at yourself that starts from data you can't fudge. You'll know within a page whether it's describing you. That's the test that actually matters.

"Isn't this just vague stuff that fits anybody?"

That's the right question. The report is required to make claims you can check against your own memory — specific and behavioural, not flattering. "You go quiet before you speak and people read it as hesitation" — you either recognise that or you don't. And it names what's missing from your chart, which is the opposite of what a horoscope does. Horoscopes flatter. This will tell you that finishing things isn't natural for you, and then explain why.

"Can you prove it works?"

Depends what you mean. Can I prove the calculations are right? Yes — in thirty seconds, against any source you like. Can I prove that a particular Day Master causes something about your personality? No, and anyone who tells you they can is selling you something. What I can tell you is that you're the one who confirms or rejects every inferred piece of it.

"Why four systems instead of one?"

It's the quality control. Any single system will produce something that sounds plausible. The interesting question is what happens when systems with nothing in common, built centuries apart, land on the same trait. Your numbers don't know your birth time. Your Chinese chart doesn't know your name. When they agree, that agreement is the finding.

"What if I don't know my exact birth time?"

Then some of it becomes less certain, and I'll tell you which parts. Fifteen minutes can move your rising sign and your hour pillar. Your birth certificate is worth chasing down.

"How is this different from the free chart I got online?"

Ask them one question: do they correct for longitude and the equation of time? Most don't. Your clock time isn't solar time, and the gap can be over half an hour — which, for a birth near midnight, moves your Day Master to a different day and changes the entire reading.

WHY I BUILT IT THIS WAY

I could have made this sound more certain than it is. Most people in this field do, and it probably sells better in the short run.

I didn't, for a simple reason: you're going to check. You'll read your report and compare it against your own life, line by line, and you'll know within a page or two whether I'm telling you the truth. Anything I've oversold will show up immediately, and it'll take the honest parts down with it.

So I've tried to build something where the parts I claim are the parts I can stand behind — the math exact and checkable, the history stated conservatively, the inferences labelled as inferences and handed to you for a verdict.

The rest is up to you to confirm.

— David Krueger The Creator's Apprentice

See it for yourself

Your Core Read is free

Two short steps — your birth details and five questions — and you'll see where three of your four systems agree about you. Nothing to pay.

Get your Core Read →