I’d Rather Have Hallucinations Than a Perfect Data Model – Joe Reis | Data Strategy Gurus

What if the messy, duplicate-ridden data you keep apologizing for is exactly what you’re supposed to have?

In this episode of the Data Strategy Gurus podcast, Yves Mulkers sits down with Joe Reis, co-author of O’Reilly’s Fundamentals of Data Engineering, the book that became a first-principles roadmap for the field. They get into why the AI “reset button” is the most fun data has been in years, why he’d take hallucinations over a pixel-perfect model nobody opens, and the AI-native stack that AI itself keeps designing.

🔑 What you’ll learn:
• Why fundamentals are “gravity” and the AI reset is an opportunity, not a threat
• The shift from “is my data clean?” to “how much signal can I get out of data that sucks?”
• Why governance and security are undercurrents, not bolt-ons
• Why he’d rather have hallucinations than a perfect data model nobody uses
• Real-time knowledge graphs and semantic layers as AI-native infrastructure
• How to read the room: what DJing taught Joe about data work

💬 Quotable: “I prefer hallucinations over the picture-perfect data model that nobody’s ever used. That’s a tragedy.”

“I’m always under the assumption your data sucks. The question is how much signal you can get out of it.”

“Batch might go the way of the dial-up modem.”

⏱️ Timestamps:
[00:00] Intro
[00:53] The lifecycle came from first principles, not tools
[02:50] When data and software engineering converge
[06:59] Tech is easy, problem-solving isn’t (show, don’t tell)
[10:04] Distilling complexity into simplicity (the wife test)
[12:24] Buzzwords don’t scare me: fundamentals are gravity
[18:32] Governance and security as undercurrents, not bolt-ons
[23:43] Say the quiet part out loud + the coming GenAI correction
[29:08] AI-ready data: signal over clean
[35:41] Hallucinations over the perfect model nobody uses
[38:10] Does AI change the lifecycle? Real-time and the live data stack
[41:06] AI-native infrastructure: real-time knowledge graphs + semantic layers
[42:35] Rapid fire
[49:16] What drives Joe / the reset-button opportunity
[51:01] Music, DJing, and the DJ-to-data parallel

📚 Joe Reis — Fundamentals of Data Engineering (O’Reilly), Practical Data Modeling newsletter
🔗 LinkedIn: https://www.linkedin.com/in/josephreis/
🔗 Substack: https://joereis.substack.com/

🎙️ Data Strategy Gurus Podcast Hosted by Yves Mulkers, Founder of 7wData & Ins7ghts. Conversations with the sharpest minds in data strategy.

🔗 Daily intelligence: https://ins7ghts.com 🔗 7wData: https://7wdata.be