Show HN: Python Simulator of David Deutsch’s “Constructor Theory of Time”

Hi HN,

I turned the freshly published paper “The Constructor Theory of Time” by David Deutsch and Chiara Marletto (arXiv, 13 May 2025) into an executable Python library.

What you’ll find
• One-to-one translation of the paper’s formalism: Substrates, Attributes, Tasks, Constructors, and task-algebra operators
• Possibility / impossibility predicates and counterfactuals encoded exactly as defined
• Test suite that mirrors every lemma and example (>95 % coverage, mypy-typed)
• Reproductions of key results: time-keeping substrates, irreversibility proofs, quantum branching tasks, and a self-replicating constructor

Why share?
Reading the paper is tough going; expressing each definition in code clarified the ideas and surfaced a couple of questions for discussion. Hoping it helps others and sparks extensions.

Repo: https://github.com/gvelesandro/constructor-theory-simulator

Thanks for taking a look—issues and PRs welcome!

Comments URL: https://news.ycombinator.com/item?id=44024055

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