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On the Moral Weight of Probabilistic Harms

When a decision system causes injury one time in ten thousand, no single instance looks blameworthy — and yet the aggregate is unbearable. A short essay on the strange moral arithmetic of probability, and on what we owe to victims whose harm is statistical rather than personal.

2026-05-26 ethicsprobabilityresponsibilityphilosophy-of-technology

Quantum Supremacy and the Ethics of Irreproducibility

A result that no laboratory on Earth can independently verify is still, in some functional sense, a result — but a different kind of result, and one for which our institutional vocabulary is not yet prepared. On what kind of knowledge survives when verification by other hands becomes impossible.

2026-05-19 quantum-computingepistemologyphilosophy-of-sciencereproducibility

When Machine Truth Is Unverifiable: Epistemic Responsibility in the Age of Opaque Models

Trust in expert testimony has always been mediated by a long chain of institutions that, at some point in the chain, contain a person who can be asked to explain. Large opaque models break that chain. The essay asks what we have inherited from earlier traditions of testimony, and what we must build that they cannot provide.

2026-05-12 epistemologylarge-modelstestimonyphilosophy-of-technology

A Reply to Bostrom on Simulation Ethics

The simulation argument is twenty-three years old and has been treated, for most of that time, as a philosophical curiosity. It is in fact a practical ethics that has been quietly inherited by the people who design and run large agentic systems. A short response, written with admiration and dissent.

2026-05-05 philosophysimulationbostromsynthetic-mindsagentic-systems

Quantum Cryptography and the Private Self

Post-quantum cryptography is usually discussed as a technical migration. It is also a redistribution of who can keep secrets, and from whom, over what period of time. A short essay on what we lose, and what we might recover, when the cryptographic ground beneath us shifts.

2026-04-27 cryptographyprivacyquantum-computingpolitical-philosophy

Reading Floridi, Fifteen Years Later

Luciano Floridi's The Ethics of Information appeared at a moment when the questions it answered seemed abstract. The questions are no longer abstract. A short, late review of a book whose argument has aged better than its reception suggested it would.

2026-04-20 reviewfloridiinformation-ethicsphilosophy-of-technology

A Syllabus on Machine Testimony

A working reading list for the question of what we ought to believe when the witness is a machine. Eight books and four papers, in the order I think they should be read, with brief notes on why.

2026-04-13 syllabusreading-listepistemologytestimonylarge-models

An Editor's Note: What This Publication Is For

A short statement of purpose. Quantum & Quill exists to take its time with arguments that other venues are obliged to compress, and to treat the ethics of intelligent machines as a problem that admits of moral seriousness rather than spectacle.

2025-07-06 editorialphilosophy-of-technologyintroduction