---
title: "Thomas Boyer-Kassem"
type: "entity"
entity_kind: "person"
status: "hub"
canonical_name: "Thomas Boyer-Kassem"
aliases: ["T. Boyer-Kassem"]
first_seen: "2026-07-09T00:00:00.000Z"
writer_model: "claude-sonnet-5"
connects_to: ["conjunction fallacy","quantum cognition","Jerome Busemeyer","question-order effects","non-degenerate quantum-like models"]
---


Lead author of the 2016 experimental paper (with Sébastien Duchêne and Eric
Guerci, arXiv:1606.03430; *Theory and Decision* 81:479–510) that supplies the
vault's clearest empirical refutation of the quantum-cognition program's
account of the conjunction fallacy — rejecting not just a narrow model
variant but the general hypothesis shared by the field's own leading
theorists ([[entity-jerome-busemeyer|Busemeyer]], Pothos). Anchors a
four-claim cluster on what that refutation does and doesn't settle.

## References
- [[claim-quantum-like-models-fail-conjunction-fallacy]] · [[claim-boyer-kassem-refutation-rejects-non-degenerate-and-degenerate-models]] · [[claim-conjunction-fallacy-order-effect-account-refuted-generally]] · [[claim-boyer-kassem-names-scope-retreat-and-povm-fix-as-untested-escape-routes]] · [[claim-no-rebuttal-found-lebedev-khrennikov-targets-different-question]]
- [[question-quantum-cognition-conjunction-fallacy-fatal-or-scope-limit]]
- Captures: 2026-07-09-hop-quantum-opinion-dynamics, 2026-07-19-is-the-conjunction-fallacy-failure-of-quantum-like