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The Physical Evidence Gap

A valid record can describe the wrong thing.

A genuine credential or intact supply-chain record does not automatically prove which person or object is physically present. This perspective explains that remaining question.

4SI perspective · July 2026
Illustrative infrastructure scene: two specialists inspect a sealed asset.
In practice

A component’s digital record may be authentic while the item at the receiving desk has been substituted. The record and the physical check answer different questions.

How it works

  1. 01

    Identify the digital claim

    What do the existing records and controls establish?

  2. 02

    Find the physical uncertainty

    What could still be wrong in the real world?

  3. 03

    Test one useful observation

    Would additional physical evidence change the decision?

Go a little deeper

Why existing digital controls still matter

Cryptography, identity, attestation and transparency services protect important parts of the system. Physical evidence is proposed as an additional input, not a replacement.

Where the question appears

Sensitive infrastructure, components, maintenance, logistics, resale, hospitality and protected service changes. Suitability must be established for each workflow.

Map one evidence gap

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