Applying the PPI Framework in U.S. Legal Practice: How Discovery Turns Zone B into Zone A
Why America’s Unique Pretrial Evidence Process Can Convert Uncertain Leads into Predictable Jury Verdicts — and How My Planned Case Against WIRED & Condé Nast Could Benefit
The Letter That Landed in My Inbox
A few days ago, I opened my email and saw this:
“Litigation can compel nothing; it is a ‘Case’ which compels Discovery and without a Case, there’s no Discovery and therefore no Evidence which is the only basis for Litigation.
In any event, there is NO INVOLVEMENT OF ■■■■ OR US OR ■■■■ IN YOUR WIRED CASE. Please leave us all out of it COMPLETELY AND IMMEDIATELY.”
The tone was abrupt, legalistic, almost rehearsed. My immediate thought? This wasn’t dashed off in the heat of the moment — this sounds like a lawyer wrote it.
And here’s the irony: under the very framework I’m about to explain — the Principle of Predictable Intervention (PPI) — this email is already a Zone B piece of evidence. It’s not proof, but it’s a signal. And in Discovery, signals like this can be converted into Zone A proof by obtaining the communications, instructions, and background that led to the message being sent in the first place.
But I’m getting ahead of myself. Let me explain PPI — and why, in the U.S. legal system, Discovery is the bridge between suspicion and proof.
I. From Complex Systems to Courtrooms: Why PPI Matters in Law
The Principle of Predictable Intervention (PPI) comes from systems thinking. It explains why some actions in complex systems produce stable results, while others collapse into uncertainty or irrelevance. It divides interventions into three “zones”:
Zone A (Predictable Layer) – The feedback loop is closed, cause and effect are connected, and the result can be anticipated with high accuracy.
Zone B (Chaotic or Question Layer) – There are clues, trends, or patterns, but too many unknowns keep the feedback loop from closing.
Zone C (Decoupled Layer) – The action is detached from observable feedback; no amount of measurement will give you a reliable result.
In the legal world, this translates neatly:
Zone A evidence is complete, verifiable, and persuasive to a jury.
Zone B evidence raises reasonable suspicion but lacks a fully closed causal chain.
Zone C evidence might sway public opinion but has no weight in court.
If litigation is an “intervention,” then Zone A is your precision-guided missile, Zone B is artillery firing through fog, and Zone C is a rumor on the wind — perhaps influential, but not decisive.
II. The U.S. Discovery System: A Built-In Evidence Upgrade Machine
In most countries, litigation works like this: you bring the evidence you already have. If the other side has documents that hurt them, they can simply keep them hidden unless criminal investigators get involved.
The U.S. is different. Here, Discovery lets you compel the other side to hand over relevant information — even if it damages their case. That means Zone B evidence doesn’t have to stay in B forever.
You can demand:
Written documents – contracts, internal reports, meeting minutes.
Electronic records – emails, chat logs, shared drives.
Financial data – payment records, budgets, transfers.
Depositions – sworn, in-person pretrial questioning of witnesses.
In PPI terms, Discovery is the machinery that moves evidence from uncertainty to predictability — from Zone B to Zone A.
III. How Discovery Closes the Loop
PPI says predictability comes from closing the feedback loop. In legal terms, that means creating an unbroken chain from the defendant’s action to your loss.
Discovery does this in three stages:
Identify the Zone B Gaps
What do you suspect but can’t yet prove? Who gave the order? Who paid for it? Was it coordinated or coincidental?
Targeted Evidence Requests
Document Requests for internal communications and contracts.
Depositions to lock witnesses into sworn accounts.
Financial Discovery to trace the money trail.
Upgrade to Zone A
Once you have the signed contract, the email chain, or the sworn testimony, the speculation becomes fact.
IV. Zone B Without Discovery
Without Discovery, Zone B evidence is like a journalist’s investigative notebook:
Anonymous tips, second-hand accounts.
Publicly visible ties between people or organizations.
Suspiciously aligned timelines.
They may make great headlines but are fragile in court — easily dismissed as “coincidence” or “unverified.”
It’s like standing outside a house, seeing silhouettes in the window, and guessing who they are. With Discovery, you can step inside, check the security footage, and see exactly what happened.
V. Why Jurisdiction Matters
In civil law countries like Germany or France, the rule is “he who asserts must prove.” Judges might personally think you’re right but still dismiss the case for lack of direct proof. They won’t force the other side to give you their internal records.
That’s why the same defamation case could have a 90% win rate in the U.S. but only 60–65% elsewhere. The facts stay the same — the system changes your ability to turn suspicion into proof.
Keep reading with a 7-day free trial
Subscribe to Xuewu Liu’s Substack to keep reading this post and get 7 days of free access to the full post archives.