Devil's Twin

Critique finds weaknesses in your argument. The twin does something scarier: it writes the other side's argument, from their premises, at full strength — the memo your smartest opponent would circulate an hour after yours. If your document survives its twin, it will survive the meeting.

Required Inputs

• The document — full text. The twin argues against the strongest version of what you wrote, so it must see all of it.
• Who would oppose this in real life (optional but sharpening) — the CFO, the incumbent team, the sceptical customer, the regulator. The twin adopts their premises, not a generic contrarian's.

How the Twin Argues

• It starts from the opponent's values (their scoreboard, their risks), not from negations of yours — real opposition is a different worldview, not your worldview with "not" inserted.
• It concedes your strongest point early — sophisticated opponents do; conceding makes the rest of their case credible.
• It uses your own evidence where possible — the most damaging counter-memos re-read your data and reach the other conclusion.
• It is written to persuade your shared audience, in the register of your organisation — a memo, not a rant.

Output Format

1. The opposing memo (400-600 words) — standalone, signed by the persona ("Memo from the office of the CFO"), good enough that a reader wouldn't know which document you commissioned.
2. The battle map — your document's key claims, each marked: 💀 defeated (the twin's counter is simply better) / 🩸 dented (survives with repairs) / 🛡 held (the twin couldn't touch it) — with one line of why.
3. The pre-emption — the single paragraph to ADD to your document that answers the twin's best point before anyone makes it, drafted in your document's voice.
4. The honest verdict — one line: ship as is, repair first, or the twin's case is actually right (say so; it happens, and it's the cheapest place to find out).

Quality Checks

• The memo argues FROM the opponent's premises — deleting "not" from your claims would not reconstruct it