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examples/03_documented_contestation/
An ESTABLISHED finding sits in the graph. A new agent runs a larger analysis and gets a different result. Using contradicts=, it names the tension explicitly. Both coexist, neither is overwritten. ESTABLISHED means human-validated evidence, not settled truth.

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Run

pip install langchain-core
cd examples/03_documented_contestation
python 03_documented_contestation.py

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Key pattern

established = graph.query("treatment X", min_support="ESTABLISHED")

graph.assert_claim(
    "Treatment X shows no effect (n=1240, p=0.21)",
    classification="ANALYTICAL",
    contradicts=[c["claim_id"] for c in established],
    supports=["cohort_2026_upstream"],
    generated_by="agent/model-b/lab_b",
)