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AI & Machine Learning · Prototype · 2026

Doc

A probabilistic causal-graph physician: exact noisy-OR inference over a causal knowledge graph, with decision-theoretic stopping that picks the most informative next question.

Year
2026
Status
Prototype
Category
AI & Machine Learning
Role
Architect & Lead

Case study

Doc

Doc is a probabilistic causal-graph physician, fronted by Macleod the cat and powered by an exact inference engine.

How it reasons

  • Causal knowledge graph. Findings link to diseases through a causal graph built from public sources.
  • Exact noisy-OR inference. Every answer updates the probability of every hypothesis exactly. There is no sampling and no LLM guesswork in the maths.
  • Decision-theoretic stopping. Doc picks the next question by its expected value of information, and stops when another question would not change the decision.

The diagnosis views show the live causal graph, the ranked differential and how each answer moved it.

Doc is invite-only at doc.macleodlabs.com.

Not a medical device and not medical advice. Parameters are illustrative or research-grade estimates from public databases.

Tech stack

Causal graphsNoisy-OR inferenceValue of informationJavaScript

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Other 2026 work