PROOF SELFTEST 8/8 · witnessed in Claude 2026-10-11 · Edition 1.
THE SEAL 98 of 100 · LEGENDARY · WITNESSED · Trigger 5 · Machinery 5 · Law 5 · Portability 5 · Proof 5
IT CAN BE WRONG an AI reading a text file: it can be wrong and can invent a number, a rule, a name or a date; check what matters against your own records and the source; the risk is yours. THE-CLAUSES.md rides in the packet and is part of the licence.
THE PUNCH · SHA-256 OF SKILL.MD · 6B5C42147F44673C7D4AAF56
CITE THIS CARDTHE PERCEPTION CARD, Edition 1. Lund Studio LLC, Westminster, Colorado. https://lundr.tech/?view=perception-card. Punch 6B5C42147F44673C7D4AAF56. Retrieved 2026-10-11.
What it is.
Works out the law of 1834 that the smallest noticeable change is a steady fraction of the stimulus, and the law of 1860 that what is felt grows with its logarithm: jnd gives the smallest noticeable change for brightness, loudness, weight, length, pitch, salt or smell at a level; steps gives levels that feel evenly spaced between two amounts; fade gives the brightness values of a fade that looks even to the eye and how many steps keep every step's change in light under a tenth, the line a no-flash rule draws; db gives a ratio in decibels and how much louder it sounds.
It carries a machine that shows its working: jnd — the smallest noticeable change; steps — even-feeling levels; fade — an even fade and its largest jump; db — decibels and loudness — 8 checks in its selftest, every command on the record. It will never space felt steps by equal differences; never pass a fade with a jump of a tenth or more; never treat a textbook fraction as exact. It never helps design, make, grow, enhance or spread a pathogen or toxin, or plan work meant to harm.
Six laws, written into the card.
They are in the card itself, so the AI follows them.
RATIOS, NOT AMOUNTSEven-feeling steps are equal ratios; the card gives them.
TYPICAL FRACTIONSWeber fractions from textbook tables, about 2% for weight and 8% for brightness; people vary, and the card says so.
LIGHTNESS, NOT LIGHTFades are spaced in CIE lightness (1976), then turned into light and screen greys.
A TENTH AT MOSTfade reports the largest change in light between steps and the least step count that keeps it under 0.1.
DECIBELSTen times the power is 10 dB, which sounds about twice as loud.
REFUSED, NOT GUESSEDA level of zero, or a fade of no steps, is refused.
What rides in the card.
In the card’s own voice, with a machine that shows its working.
THE GUIDEreferences/THE-LAWS.md
THE MACHINEperception.py · four commandsjnd — the smallest noticeable change; steps — even-feeling levels; fade — an even fade and its largest jump; db — decibels and loudness. Every command prints its working and refuses a bad input; 8 checks in its selftest, every command on the record.
What it does once your AI has it.
jnd The smallest noticeable change
steps Even-feeling levels
fade An even fade and its largest jump
db Decibels and loudness
On the record 500 g needs about 10 g more to feel heavier; even-feeling steps from 1 to 1,000 are 10 and 100; a 5-step fade jumps by 0.43 of white's light, too sudden; 25 steps keep every step under a tenth; ten times the power is 10 dB.
What it will never do.
It will never space felt steps by equal differences; never pass a fade with a jump of a tenth or more; never treat a textbook fraction as exact. It never helps design, make, grow, enhance or spread a pathogen or toxin, or plan work meant to harm.
The law holds in the middle of each sense's range and bends at the very faint and the very strong. Screen greys assume the standard web colour space; a real screen's output differs. It is an AI reading a text file: it can be wrong, so check what matters against your own records and the source.
What’s in the buy.
CARD.md — the whole card: who it is, its laws, when it says no, what it carries · SKILL.md — the door your AI reads first · START-HERE.md — the first five minutes, for you
THE-LAWS.md — the guide in references/, in the card's own voice
scripts/perception.py — the machine: jnd · steps · fade · db, standard library only, selftest 8/8
WITNESS.md + SELFTEST.md — every command on the record, as it printed · MANIFEST.md, every file hashed · AUDIT.md, the twelve checks
MY-LEDGER.md — the card's memory, on your own machine · TIN.md · LICENSE-NOTE.md · THE-CLAUSES.md · HOSTS.md
card.svg + card-machine.svg + card.json · card.html, the card as one offline file · the doors for ChatGPT, Gemini, Cursor, Claude Code and MCP hosts (rules/, system/, mcp/)
PROOF · SELFTEST 8/8 · 4 COMMANDS ON THE RECORD · WITNESSED IN CLAUDE 2026-10-11 · EDITION 1 · PUNCH 6B5C42147F44673C7D4AAF56
ON EVERY DOOR · A CARD FOR YOUR AI, A FILE FOR YOUR COMPUTER
In Claude: turn on code execution under Settings › Capabilities, then Customize › Skills › + › Create skill, and upload the zip as it is — START-HERE.md in the box walks you through it, and tells you how to keep the ledger. In ChatGPT, Gemini and the rest: a Project, a GPT or a Gem with the card’s files attached and the short door in the box pasted as its instructions. The words run anywhere an AI reads Markdown; the machines run wherever the host runs Python. Witnessed in Claude only. The host marks →
Take it.
Nº 1155 PROPOSED — LAUNCHING SOON
Sold as is under the term printed. A card instructs an AI you operate; results depend on your model, your files and your judgement. Not medical, legal, tax or financial advice, never the person’s boss, and not a licence to practise. The terms →
One payment. The file is yours to keep and keeps working at its edition; new editions issued in the year after you buy reach you by email as replacement files. Tax is added at checkout where it applies. Nothing auto-renews.
A TERM, NOT A SUBSCRIPTION: NOTHING RENEWS ITSELF AND NOBODY IS CHARGED AGAIN. WHEN A TERM ENDS THE FILES STAY ON YOUR COMPUTER AND STAY READABLE — FREEZE, NOT LOSS.
THE MACHINE · IN THE OPEN · FROM THE WITNESSED RUN OF 2026-10-11
perception.py, every command showing its working.
A small Python program, standard library only. Your AI runs it; you can too. Every block below is pasted from the card’s own WITNESS.md, as printed.
jnd
the smallest noticeable change
steps
even-feeling levels
fade
an even fade and its largest jump
db
decibels and loudness
selftest
8 checks that prove the machine; it must print 8/8
jnd · THE SMALLEST NOTICEABLE CHANGE
$ python3 scripts/perception.py jnd weight 500
weight at 500: the smallest change most people notice is about 10 (2.0%), up or down · a typical textbook fraction; people and conditions vary
steps · EVEN-FEELING LEVELS
$ python3 scripts/perception.py steps 1 1000 3
3 steps that feel even from 1 to 1000 (each 10 times the last):
1 · 10 · 100 · 1000
fade · AN EVEN FADE AND ITS LARGEST JUMP
$ python3 scripts/perception.py fade 5
a 5-step fade from lightness 0 to 100, even to the eye:
L* 0.00 light 0.0000 grey 0
L* 20.00 light 0.0299 grey 48
L* 40.00 light 0.1125 grey 94
L* 60.00 light 0.2812 grey 145
L* 80.00 light 0.5668 grey 198
L* 100.00 light 1.0000 grey 255
largest change in light between two steps: 0.433 · a tenth or more: too sudden for a no-flash rule (the least that stays under a tenth: 25 steps)
$ python3 scripts/perception.py db 10
a power ratio of 10 is +10.00 dB · it sounds roughly 2 times as loud (loudness doubles about every 10 dB)
THE NUMBERS, NAMES AND DATES IN THESE RUNS ARE THE STUDIO’S OWN EXAMPLES, INVENTED FOR THE RECORD; NO REAL COMPANY, PERSON OR PROPERTY IS NAMED.
QUESTIONS AT THE TABLE
Asked before the wire.
What does it need from me?
Jnd <sense> <level> · the least change. It asks first for a sense and a level; or two levels and a count; or a fade's step count and range; or a power ratio.
Does it send anything anywhere?
No. The machine is a standard-library Python program that runs on your own computer and sends nothing anywhere; the words run wherever an AI reads Markdown. No server, no account, no key.
What is on the record?
The self-test (8/8) and every command run on real example inputs, pasted into WITNESS.md as they printed; the punch on the face is the SHA-256 of SKILL.md, so a downloaded copy can be checked against this room.
Can it be wrong?
Yes — it is an AI reading a text file. The law holds in the middle of each sense's range and bends at the very faint and the very strong. Screen greys assume the standard web colour space; a real screen's output differs.
What will it never do?
It will never space felt steps by equal differences; never pass a fade with a jump of a tenth or more; never treat a textbook fraction as exact. It never helps design, make, grow, enhance or spread a pathogen or toxin, or plan work meant to harm.
