# What a partial trace can and cannot identify

ID: identifiability-from-projections
Canonical: https://rezonansapp.com/nodes/identifiability-from-projections
Version: 1
SHA256: e6e0c50ac5af02724654db82632753f3109ce81358ebb44e6c54f71b5046e91b
Epistemic kind: reconstruction

## Question

What can be inferred from a partial trace, and what remains unidentifiable?

## Formulation

Distinguish a latent state from its visible projection and ask how multiple views, missing data, and prior structure narrow possible interpretations.

## Tension

A coherent hidden explanation can fit the observations without being uniquely warranted.

## Challenge

What alternative structure fits the same visible evidence, and what observation would separate them?