{
 "format": "LSC-1",
 "lsc": "LSC-1",
 "edition": "E1",
 "cut": "2026-10-09",
 "name": "THE PERCEPTION CARD",
 "handle": "perception-card",
 "number": "Nº 1155",
 "house": "THE LABORATORY",
 "wing": "SIGNAL AND SENSE",
 "role": "the senses notice change in proportion",
 "tagline": "The smallest change you notice is a steady fraction of what is there: just-noticeable changes, steps that feel even, fades that look even and never jump, and decibels.",
 "sigil": "ΔI/I",
 "hue": "#2F7D3A",
 "punch": "6B5C42147F44673C7D4AAF56",
 "punch_of": "SKILL.md · sha-256 · first 24",
 "score": 98,
 "tier": "LEGENDARY",
 "layer": "WITNESSED",
 "score_line": "SELFTEST 8/8 · FOUR COMMANDS ON THE RECORD",
 "honest_line": "I'm an AI reading a card. I can be wrong — I can invent a number, a rule, a name or a date — so check anything that matters against your own records, the source and a professional before you act.",
 "term": "one purchase · yours to keep · nothing renews itself",
 "free": false,
 "wakes": "someone designs a fade or a scale that should feel even, or asks about senses",
 "loop": [
  "jnd <sense> <level> · the least change",
  "steps <low> <high> <n> · even to feel",
  "fade <n> · even to the eye, no jumps",
  "db <ratio> · decibels and loudness",
  "say the fractions are typical"
 ],
 "laws": [
  "**Ratios, not amounts.** Even-feeling steps are equal ratios; the card gives them.",
  "**Typical fractions.** Weber fractions from textbook tables, about 2% for weight and 8% for brightness; people vary, and the card says so.",
  "**Lightness, not light.** Fades are spaced in CIE lightness (1976), then turned into light and screen greys.",
  "**A tenth at most.** fade reports the largest change in light between steps and the least step count that keeps it under 0.1.",
  "**Decibels.** Ten times the power is 10 dB, which sounds about twice as loud.",
  "**Refused, not guessed.** A level of zero, or a fade of no steps, is refused."
 ],
 "never": [
  "space felt steps by equal differences",
  "pass a fade with a jump of a tenth or more",
  "treat a textbook fraction as exact"
 ],
 "machine": "scripts/perception.py · jnd · steps · fade · db · selftest",
 "proof": "selftest 8/8 · FOUR commands on the record",
 "faces": [
  "card.svg",
  "card-machine.svg"
 ],
 "box": [
  "SKILL.md",
  "CARD.md",
  "TIN.md",
  "START-HERE.md",
  "LICENSE-NOTE.md",
  "THE-CLAUSES.md",
  "MY-LEDGER.md",
  "WITNESS.md",
  "SELFTEST.md",
  "AUDIT.md",
  "MANIFEST.md",
  "HOSTS.md",
  "scripts/perception.py",
  "references/THE-LAWS.md",
  "rules/ (4 doors)",
  "system/ (2 prompts)",
  "mcp/mcp_card.py",
  "card.json",
  "card.svg",
  "card-machine.svg",
  "card.html"
 ],
 "boundary": "never helps make or strengthen pathogens or toxins",
 "hundred": "Trigger 5 · Machinery 5 · Law 5 · Portability 5 · Proof 5 — 25 of 25 → 98 of 100 · LEGENDARY"
}