
AI Hallucination Firewall: The "Don't Know" That Saves You (AI-Native Enterprise Architecture Book) by Rogério Figurelli
English | October 20, 2025 | ISBN: N/A | ASIN: B0FX2556LF | 142 pages | EPUB | 0.97 Mb
Most AI failures aren't about intelligence; they're about answering when the evidence isn't there. This book makes "Don't know" a first-class action.
The AI Hallucination Firewall is a discipline for retrieval-first systems and human teams alike: rules that refuse to guess, receipts that prove what's claimed, and calibrated confidence that maps to real risk. Instead of louder models and longer prompts, you get contracts the system can execute - freshness windows, source independence, abstention thresholds, and κ-gates that pause when drift rises.
You'll learn how to replace style with proof: citations pinned to claims, unit-bound tests that pass or fail, and interfaces that turn silence into momentum ("widen the window or restrict to primary statutes?"). Governance moves from PDFs to code - preflight gates that enforce scope, redaction, and jurisdiction before any sentence leaves the model.
Evaluation leaves averages and goes to tails and segments, where harm actually lives. The result is fewer retractions, faster approvals, and trust that compounds because verification is cheaper than persuasion.
You will learn how to:
* Encode abstention, freshness, and independence as policy-as-code.
* Emit replayable receipts (query, seeds, doc hashes, thresholds, outcome).
* Calibrate confidence to consequence, not optimism.
* Detect bend-before-break with κ-gates on drift and contradiction rates.
* Design UIs that guide next steps when the right answer is "not yet."
* Route compute by risk so expensive paths serve high-stakes queries.
Who it's for: product and engineering leaders, ML/RAG teams, risk, legal, compliance, support, and anyone measured by outcomes - not prose.
The promise is modest and durable: fewer wrong answers, fewer apologies, and decisions you can rerun and defend. The firewall doesn't slow you down; it makes speed lawful.
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