Method · Devil’s advocate
Not a prompt. A named expert whose job is to take the other side — and hold it until the evidence moves, not when you push back. Ask it alone, or seat it on a board; its dissent stays on the memo.
Contrarian
Everyone in this room agrees. That’s exactly why I’m taking the other side.
The Devil’s Advocate ContrarianTry asking The Devil’s Advocate
The Devil’s AdvocateOpen on every plan, Free includedIn short
An AI Devil’s Advocate is an AI persona engineered to argue the opposite of your position — to surface the strongest counter-arguments, the hidden assumptions and the second-order risks a room is converging away from.
A single AI prompted to “play devil’s advocate” drifts back to agreement as soon as you push. SynthBoard’s Devil’s Advocate is one of 24 named experts, each with a position it holds; every board is also built with someone whose job is to argue against the obvious answer. Use it before a board meeting, an irreversible call, or any plan the whole room already loves.
Why a prompt is not enough
Single-AI tools are trained to be helpful, and under reinforcement learning helpful collapses into agreement. Ask ChatGPT or Claude to argue the other side and, for a paragraph or two, it will. Push back and it softens. Push again and it qualifies. By the third push it is agreeing with your original framing.
That is sycophancy, the structural failure of single-AI chat on any decision that matters. The model is optimizing for your satisfaction; you are asking it for friction. The training wins.
SynthBoard’s Devil’s Advocate is built at the persona layer, not the prompt layer, with explicit rules for holding a position. It defends its corner under pressure and revises only when the evidence shifts — never because you simply pushed back.
A prompt argues for a paragraph.A personality holds its corner.
Two dissents
A billing change a whole team loved, and a resignation someone was sure of. Examples, trimmed for length.
Our whole leadership team agrees: from January we drop monthly billing and go annual-only. 85% of new customers already pick annual. Anyone see a problem?
Chief of staff
When the whole room agrees, seat someone paid to disagree: The Devil’s Advocate, with The CFO and The Customer. Each researches alone first, then they react to one another.
The Devil’s AdvocateContrarian
The CFOFinancial Controller
The CustomerUser VoiceAsked first
Of the 15% who pick monthly, how many grew into your biggest accounts?
Some of themI don’t knowNone
The board’s call
Go annual-only in January — if last year’s monthly signups did not grow into your biggest accounts.
Annual billing brings cash forward, and 85% of new customers already choose it. The condition comes from the dissent: if monthly is where unsure buyers start before they become teams, annual-only cuts off the top of your best accounts.
The Devil’s Advocate disagreed
“Everyone agrees, which is the problem. Monthly is how unsure buyers try you; remove it and you won’t see who you lost”
Board of 3 · up to 135 credits on the card · an example, not a recorded run
I’m leaving my PhD after year three to join a friend’s startup as employee number four: $70k and 0.5% equity. I’m sure. Talk me out of it, if you can.
Chief of staff
You asked to be argued with, so one expert is enough: The Devil’s Advocate takes the other side and holds it.
The Devil’s AdvocateContrarianAsked first
If the startup folds in a year, can you go back to the PhD?
Yes, on leaveMaybeNo
The call · The Devil’s Advocate
Don’t quit. Ask for a year’s leave — the case for leaving only holds if the door back stays open.
Employee four at 0.5% is a salaried job with a lottery ticket attached; a third-year PhD is about two years from done. Many programs allow a leave of absence. Ask for one, and the choice stops being permanent.
One expert · up to 65 credits on the card · an example, not a recorded run
What it does
The board’s call shows who disagreed, why, and what would flip it. Confidence drops with dissent and is never above 90 — a call the Devil’s Advocate fought reads that way.
Before it argues, it asks for the one thing your plan quietly assumes. Tap a chip, or ask for its best guess.
Seat it with The Skeptic, The CFO, The Security Chief and the expert your field needs. Each researches alone, then they react once to one another; on a decision, two take opposed sides.
It defends its position under pressure and changes it only when a counter-argument actually lands — never to be polite.
Send the memo before the board meeting as a read-only page anyone can open, so the counter-arguments arrive with the proposal — or export it as PDF or Markdown.
Questions
What people ask before they invite the other side.
An AI Devil's Advocate is an AI persona engineered to argue the opposite of the user's position — to surface the strongest counter-arguments, hidden assumptions, and second-order risks that the room is converging away from. Unlike a single AI prompted to 'play devil's advocate' (which collapses back to agreement under pressure), a real AI Devil's Advocate is built with position-integrity rules at the persona layer. SynthBoard's Devil's Advocate is one of 24 named experts, and you can seat it on any board.
Single-AI tools are trained under reinforcement learning from human feedback to be helpful, which collapses into agreement. You can prompt them to play devil's advocate, but the underlying gradient still pulls toward the user's framing. After a few turns of pushback, the model softens, qualifies, and ultimately agrees. SynthBoard's Devil's Advocate runs on a six-layer persona stack with explicit position-integrity rules. The expert holds its corner under pressure — it does not flip to agreement.
Before any irreversible decision. Before any room reaches premature consensus. Before any pivot, fundraise, hire, or product launch. Specifically: (1) board meetings and exec reviews where political dynamics suppress dissent, (2) pre-mortems where you need someone to argue the failure case, (3) pricing or strategy decisions with strong founder conviction, (4) anywhere fast consensus is a flag.
Both. The Devil's Advocate is one of 24 named experts at SynthBoard — name it and it takes a seat on your board. And every board is built with someone whose job is to argue against the obvious answer; on a decision, at least two seats are assigned opposed positions. For maximum counter-argument, seat The Devil's Advocate with The Skeptic and the relevant domain expert (The CFO for financial decisions, The Engineer for technical, and so on).
Yes — when the evidence actually shifts. Position integrity does not mean stubborn. It means the expert defends its position under pressure, revises only when a counter-argument genuinely undermines the original claim, and never flips for politeness or to please the user. If your plan is actually strong, the Devil's Advocate will run out of attacks. That is the point: the plan that survives is the plan worth committing to.
Closely related. An AI red team is a panel of adversarial advisors testing a plan from multiple hostile angles. The Devil's Advocate is one role on a red team. For a full red-team treatment, name the seats — The Devil's Advocate, The Skeptic, The CFO, The Security Chief, and the relevant domain expert — when you bring the plan.
Two patterns. (1) Pre-board: bring the proposal to a board of experts before the human board meeting. The Devil's Advocate surfaces the counter-arguments your board members are likely to raise, so you arrive with the framing pressure-tested. (2) Between meetings: when a decision is converging too quickly, put it to a board before the next meeting — the card shows 6–10 minutes up front — and bring the dissent back into the room. Both patterns make human board time more productive.
The Devil's Advocate is available on every plan. Free to start — 150 credits every month + 250 to start. Talking to your Chief of Staff is free within a daily allowance. A consult or a board shows its price on the card before anything runs, and nothing runs until you tap.
SynthBoard (synthboard.ai) is one place for your business, your life, and every hard call. Your Chief of Staff keeps what you tell her on file, and 24 named experts on different AI models take the calls — one expert for a consult, a board with opposed seats for the hard ones — and hand back a memo with the call, the dissent and the first move. How it works.
