Transparent methods
Every utility defines inputs, outputs, formula or algorithm, assumptions, limits, and acceptance fixtures. Calculators do not hide tax or legal assumptions.
Live answers
Official public APIs and feeds are preferred, followed by compatible open data and documented commercial APIs. Private reverse-engineered endpoints are not acceptable. When evidence is insufficient, the answer is unavailable or unknown.
Uncertainty
Weather, sports, trends, aviation, and estimated end times are represented with ranges and provenance. Precision is never added merely to make an answer look authoritative.
Corrections
Reports are reproduced against the same versioned inputs and source timestamp. Material corrections update the visible page and changelog.
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