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Re:Mind with Juan Carlos

Re:Mind is a weekly newsletter exploring mental models and frameworks that help you think clearly and make better decisions. Each week, I share practical insights and tools that transform complex ideas into wisdom you can apply immediately. Join me in making better decisions, together.

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Featured Post

Accuracy is Overrated

Hello Reader, The London Underground map is a lie. Stations that are miles apart look like they are inches apart. Curves become straight lines. The Thames, a winding river cutting across the city, is reduced to a gentle kink. Every geographic fact has been distorted or discarded. And it's one of the most useful designs ever made. That's abstraction: reducing complexity by focusing on structure instead of details. Not oversimplification: you don't lose what matters. Not generalization: you...

Hello Reader, Two people in your department want the same promotion. One gets it; the other doesn't. No second title appears. No compromise splits the role in half. The outcome feels like competition—and it is. But look closer at what makes it specific: the total number of promotions available didn't change. The gain for one person came at a direct cost to the other. A zero-sum game is a situation where one side's gain exactly equals the other side's loss. Total value inside the boundary...

Hello Reader, Nobody wanted Thai food. You suggested it because you thought your friend liked it. Your friend agreed because she assumed you were craving it. Two more people went along because the decision seemed made. By the time the pad thai arrives, everyone's quietly wishing they'd said something. Now scale that to a boardroom, a product roadmap, or a company strategy, and you start to see the damage. The Abilene Paradox describes a group collectively choosing a course of action that no...

Hello Reader, Daniel LaRusso wants to learn karate. His teacher hands him a sponge and points at a car. Wax on, wax off. Then a paintbrush, up, down. Then sandpaper. For days, Daniel thinks he's doing chores. He's frustrated, confused, and close to walking away. Then Miyagi throws a punch. Daniel blocks it, instinctively, using the same motion he's been drilling all week. The chores were the lesson. He'd been learning the whole time. The Karate Kid captured one of the most useful ideas in...

Hello Reader, Here's the pattern: you set a target. You hit it for a week, maybe two. Then a bad day arrives (low energy, fractured schedule, unexpected chaos) and you miss. Not by much. But by the goal's own logic, a miss is a miss. So you log the failure. Then you miss again. Then the goal quietly dies, buried under a pile of "not todays." The goal didn't fail because you lacked discipline. It failed because it only had two states: perfect or pointless. And that binary is a trap. The ABC...

Hello Reader, My wife Taylor hosts a podcast called Doomed to Fail with her co-host Farz. The premise: take history’s most notorious disasters and epic failures, analyze the red flags, and ask the uncomfortable questions: How did things go so wrong? Could this have been avoided? They invited me to talk about a mental model that answers both questions. It’s called second-order thinking. And I wanted to share the core ideas with you here, because this pattern is everywhere. The Scene That...

Hello Reader, Austria and Germany share a border, similar cultures, and comparable healthcare systems. Ask citizens of both countries whether they support organ donation, and roughly 85% say yes. Yet Austria has a 99% organ donor registration rate, and Germany sits at 12%. Same values. Same medical infrastructure. Opposite outcomes. The difference? Austria uses opt-out registration. Germany uses opt-in. In Austria, you are considered a donor unless you actively decline. In Germany, you're not...

Hello Reader, February 1, 2003. Space Shuttle Columbia disintegrated over Texas during reentry. Seven astronauts die. NASA investigators later traced the failure to a foam strike during launch (a piece of insulation that hit the wing at 500 mph). Engineers knew about the strike. They analyzed it. They presented their findings to management sixteen days before the disaster. Their slide said: "Review of test data indicates conservatism for tile penetration." Management saw no red flags. The...

Hello Reader, Athens, 461 BC. Workers haul limestone blocks under the Mediterranean sun, building walls that will connect the city to its port at Piraeus. The Athenian navy has just played a crucial role in helping to defeat the Persian Empire. Their democracy is flourishing. Trade routes are expanding. They're becoming wealthy, confident, and powerful. Fifty miles south, Spartan leaders watch. They see the walls rising. They calculate what those fortifications mean—Athens can now withstand a...

Hello Reader, My product roadmap started with three clear phases. Then marketing requested one automation. Sales needed a dashboard feature. Operations wanted a process update. Leadership suggested an innovative integration. Six months later, I was still in phase one. Nothing had shipped. My team was exhausted. I'd become a product therapist, managing expectations instead of executing the plan we all agreed on. The problem wasn't that the requests were bad. It's that I never defined when to...