# Public Euclid-plus-SEP treat demonstration as a shareable argument, later under his name

Date: 1926

## The fact

Elements as public text plus SEP’s caution still leave a heading: proof as something others can check. A modest resilience-adjacent path of medium confidence: argument not oracle, even if the founder-life is oracle-heavy.

## Context

Twin of wonder-working harm. This stores checkable proof as later school practice.

[Pythagoras](/people/pythagoras) 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.

## Evidence and sources

Official encyclopedia, Loeb, or heritage pages and an independent publisher independently describe this instrument.

Official or archival record: Clay Mathematics Institute — Euclid’s Elements (https://www.claymath.org/euclid/; Clay Mathematics Institute).

## Significance

Printed demonstration is not a ballot.

Printed demonstration is not a ballot.

## What is established and what is not

Established as a dated public record of this instrument.

What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions.

The date is the date of this instrument, not a licence to back-date every later harm or benefit.

## People

- Pythagoras: https://factrail.ai/people/pythagoras

## Drivers

- Democratic Resilience: https://factrail.ai/drivers/democratic-resilience

## Sources

- https://www.claymath.org/euclid/
- https://plato.stanford.edu/entries/pythagoras/

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/py-mathematical-public-reason