Dark warm-charcoal cover reading What Is Undo, with a large faint amber circular undo arrow at the right and the line: an undo restores configurations, it does not restore readings, and its reach is exactly the set of marks nobody has read yet.

What Is Undo

You were taught that undo reverses an action and puts you back before it. Every undo you have ever pressed did the opposite — it added, and the systems where the feature works are add-only underneath. The foundation I work from says the direction of time is not a container that events sit inside but a property of a pair: a record that only grows and an expectation that only updates forward. Undo is the ordinary object that pries the two apart. It restores configurations, it does not restore readings, and its reach is exactly the set of marks nobody has read yet. … readWhat Is Undo

Dark cover with a faint plus-minus glyph: The Exchange Rate on Bad News — your attention pays roughly double for the minus sign, a rate set when bad news could kill you.

The Exchange Rate on Bad News

The math of surprise is perfectly symmetric — a doubling and a halving are mirror twins. Your attention has never honored the symmetry: it pays roughly double for the minus sign, every business paid in attention has found that premium, and the rate was set in a world where bad news could kill you. It no longer can — but the rate never moved, and for the first time the filter that quotes it takes instructions. … readThe Exchange Rate on Bad News

Warm paper-toned cover with the title The Placebo Term, the word Placebo in ember italic, and a large faint letter k in the corner

The Placebo Term

The Reality Equation quietly assumes the Actual cannot hear your Expectation. In clinics, banks, classrooms, and every model trained on your approval, it can — expectation leaks into outcome, and surprise is cancelled at the source. The last refuge of learning is the part of the world that still refuses to obey you. … readThe Placebo Term