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Eva Keiffenheim

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Activated Thinker

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Eva Keiffenheim

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Feb 7

How to Validate AI Output Like a Subject Matter Expert

A 3-step protocol to build evaluative judgment without spending years doing the work yourself

How to Validate AI Output Like a Subject Matter Expert

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Publishous

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Eva Keiffenheim

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Dec 6, 2025

The One Skill that Solved My Life’s Biggest Riddle

And it wasn’t more discipline or ‘Atomic Habits’.

The One Skill that Solved My Life’s Biggest Riddle

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Age of Awareness

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Eva Keiffenheim

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Aug 11, 2025

The Smartest People I Know Are Obsessed With a Skill Many Were Told Is Useless

The same technology promising to make us smarter is preventing the one thing our brains need to think.

The Smartest People I Know Are Obsessed With a Skill Many Were Told Is Useless

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Activated Thinker

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Eva Keiffenheim

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Mar 23

What Your Brain Is Still Better At Than AI

Two questions for sorting what belongs in your brain from what you can offload to AI.

What Your Brain Is Still Better At Than AI

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Activated Thinker

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Eva Keiffenheim

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Feb 27

After 10 Years of Believing I Wasn’t a Sports Person, I Now Deadlift 100kg

Why showing up wasn’t enough and the practice that helped me improve.

a graphic of a spiral

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Activated Thinker

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Eva Keiffenheim

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Feb 19

The Smartest Way to Protect Your Ability to Learn Deeply Has Little to Do With Willpower

An evidence-based look at how notifications reshape our brains and the setup I use to reverse the damage.

The Smartest Way to Protect Your Ability to Learn Deeply Has Little to Do With Willpower

In

Books Are Our Superpower

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Eva Keiffenheim

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Feb 3

Why Most Investment Advice Is Useless For The Average Person

How Max Matles’s ‘Big Wealth, Big Gap’ helped me see the systemic trap of modern finance

Why Most Investment Advice Is Useless For The Average Person

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Activated Thinker

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Eva Keiffenheim

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Feb 2

The Two Skills That Replace Effort When AI Does the Work

Why the constraint of knowledge work has shifted from ‘doing’ to ‘checking’ — and how to build the judgment required to spot errors in…

The Two Skills That Replace Effort When AI Does the Work

In

Books Are Our Superpower

by

Eva Keiffenheim

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Jan 15

The Limits of Critical Rationalism in David Deutsch’s ‘The Beginning of Infinity’

Why a philosophy of openness must also examine its own exclusions

The Limits of Critical Rationalism in David Deutsch’s ‘The Beginning of Infinity’

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Mind Cafe

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Eva Keiffenheim

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Jan 9

How I Went From Bad Memory to Retaining What I Learn

A science-backed path from “knowing about” ideas to being able to use them.

A high-contrast, black-and-white architectural photograph looking down into a smooth, sweeping spiral vortex, representing the complex and deep neural pathways of human memory.

Eva Keiffenheim

Eva Keiffenheim

she/they

I write about how humans learn and how AI changes that https://evakeiffenheim.substack.com/ . Formerly a teacher, still a student.

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