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Encyclopaedia Iranica and Britannica state that the century of Zarathushtra is high-uncertainty

Iranica’s 2009 general survey states that one does not know when and where he lived, and that proposed dates range widely. In the causal graph this event weakens Digital Learning Access, a driver that weakens Learning Poverty Rate (low- and middle-income countries) — a worsening welfare path.

Read the full account

Iranica’s 2009 general survey states that one does not know when and where he lived, and that proposed dates range widely. Fake-precision in school timelines is a knowledge-harm.

Context

High confidence on the uncertainty.

Zoroaster is not the sole author of every later object, law, or museum label that uses the name. Shared work with courts, excavators, printers, spouses, officials, and later states does not erase a documented role, and it does not make an ancient person the signer of a twentieth-century statute.

Why it matters

An Iranica warning is not a birthday.

An Iranica warning is not a birthday.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

  • Zoroaster

    Person

    Direct responsibility

    responsibility level 0.21 · verified

    Named prophet as heading of later hymns and state religion. Redactors, Sasanian kings, and later Parsi printers publish the instrument.

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Encyclopaedia Iranica — Zoroaster ii. General surveyEncyclopaedia Iranica · High credibility · verified
  2. 2.Britannica — ZoroasterEncyclopaedia Britannica · High credibility · verified
What the sources establish

Britannica refuses a precise birth year.

General survey (https://www.iranicaonline.org/articles/zoroaster-ii-general-survey/ (opens in a new tab); Encyclopaedia Iranica).

Later competitions, monuments, translations, UNESCO listings, and museums are not converted into extra lifetime acts. That reading is an impact-path choice, not a property stored on the Fact itself. Confidence is stated on the impact path. A later English edition is not a recovered autograph. If a number is not in the two records named above, it is not supplied here.

Causal path

How this event connects to drivers and indicators in the graph.

  1. ActorZoroaster
  2. contributed toFactEncyclopaedia Iranica and Britannica state that the century of Zarathushtra is high-uncertainty
  3. weakensDriverDigital Learning Access
  4. weakensIndicatorLearning Poverty Rate (low- and middle-income countries)

Cite this page

Factrail. (2026). Encyclopaedia Iranica and Britannica state that the century of Zarathushtra is high-uncertainty. Factrail. https://factrail.ai/facts/zo-century-uncertainty-gap

https://factrail.ai/facts/zo-century-uncertainty-gap

Accessed 16 October 2026.

By the Factrail desk · Method: how we source and score · Last reviewed

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