The problem
A confirmed case is not proof of the path by which it spread. An epidemiological event can have multiple credible pathways; proximity, timing and resemblance are clues rather than established causation.
Analytical approach
Require laboratory confirmation, movement records, official epidemiology and dated geographic context before causal attribution.
Falsifiable test
A confirmed alternate source or an impossible timeline would overturn the favored path.
Operational implications
A defensible workflow should record the exact input, collection method, version, context, counter-explanation and reason for the conclusion. Reviewers should be able to disagree with the inference without losing the underlying observation. When this topic is applied to a real investigation, safety, lawful authority and domain-qualified professional guidance take precedence over a generic article.
Next research step
Publish a small case study with a documented baseline, an adversarial or failure-mode control, outcome criteria and enough data to reproduce the result. Report inconclusive findings alongside successes. This page is a research primer, not a claim that the proposed test has already been performed.
Source and revision record
Original editorial analysis and definitions. For background reference, consult the source catalog.