Convergent Evidence
Definition
Two or more independent lines of evidence that point to the same conclusion. Each line alone may be inconclusive; together they substantially increase the probability of a single explanation.
- Requires
- Two or more independent lines of evidence
- Effect
- Raises probability of a shared explanation
- Example field
- Botanical evidence in casework
Common questions
Why is convergent evidence treated as stronger than a single line of evidence?+
Independent methods carry different sources of error and bias, so when they agree it is far less likely that the agreement arose purely by chance than when relying on one method alone.
What undermines a claim that two lines of evidence are convergent?+
If the supposedly independent lines actually rely on the same underlying assumption, dataset, or examiner judgement, they are not truly independent, and their agreement adds little extra confidence.
Related terms
- Evidential Ambiguity
- The condition in which a finding is consistent with more than one explanation. Proper reporting quantifies the range of possible interpretations rather...
- Macrobotanical Evidence
- Plant material visible to the naked eye or under low magnification: leaves, seeds, fruits, stem fragments, bark. Complements microbotanical (pollen, diatom) evidence...
- Operational Briefing
- A short, non-technical communication from the specialist to the investigating officer translating laboratory findings into investigative actions, without the full report detail.
- Provenance
- The documented origin of a media file: the device that captured it, the time and location of capture, the chain of custody...
- Scene Reconstruction
- The process of working backward from physical evidence to infer the sequence of events, locations involved, and linkages between persons, objects, and...