Ian Reppel

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Beyond Oracles: LLMs as Question Machines

It’s not a bad thing finding out that you don’t have all the answers. You start asking the right questions.

03 Jan 2026

The Spectral Gap Problem in Quantum Annealing

Quantum annealing promises quantum advantage, courtesy of quantum tunnelling. But a single, elusive quantity, the spectral gap, determines whether it works. And in almost all interesting cases, that gap is either vanishingly small, unknowable in advance, or both.

01 Dec 2025

The Ones Whose Light the World Dimmed

A lament for the gentle, and a reckoning with the rain that soaked them.

29 Nov 2025

A Vision for a Calmer World

Imagine a world that is less angry, less anxious, less stressed.

26 Nov 2025

The Cost of Calm

Stress, anger, and anxiety do not only fray lives, they cost the global economy on a colossal scale.

25 Nov 2025

Why Product Managers Make Terrible Customers

When product managers become customers themselves, they seem to forget their craft and instead fire off wish lists as if they were talking to Santa Claus.

24 Nov 2025

The Timestamp Delusion

At Spotify, we once chased a problem that sounded straightforward enough: how does a listener reach the moment where they press play?

23 Nov 2025

One Second of Sanity

What if you could pause before an emotional outburst?

19 Nov 2025

Rotten Bridges

Our professional networks are sacrosanct. Every person you once sat next to is a long-term asset. Let any connection lapse and you are supposedly sabotaging your future.

15 Nov 2025

The Inertia Machine and The Physics of Bureaucracy

The behaviour of any bureaucratic organization can best be understood by assuming that it is controlled by a secret cabal of its enemies.

14 Nov 2025

The Golden Carrot

Think of RSUs as a promise of a bonus, not guaranteed compensation or even ownership.

07 Nov 2025

No hay plan

No hay plan, sólo pose. El presidente que prometió terapia de shock admitió en TV que no hay plan para mejorar el bolsillo de la gente.

05 Nov 2025