An accepted paper dispatch slip sits on a desk in the foreground while an empty loading bay is visible through the doorway.
Lesson 1, Topic 2 of 4

Agreement Has a Boundary

Agreement concerns the digital record. It does not by itself establish that a physical event happened. Harbour can record an authorized dispatch while the crate remains beside the loading door. The record and the world need separate checks.

This distinction helps make a useful beginner promise. We will explain consensus choices, compare their assumptions and complete a supported decision blueprint.

We will not configure a network, move funds or decide legal settlement. A boundary is most useful when it changes a claim someone might otherwise make.

“Everyone agreed, so delivery occurred” crosses that boundary. “The accepted record contains a dispatch authorization; delivery needs receiving evidence” stays within it. In a meeting, say what the evidence supports before naming the technology.

Work through the case

All four organizations see an accepted dispatch record. The buyer reports that the receiving bay is empty.

Rewrite the claim that agreement proves the crate was delivered. Record your response in worksheet section problem.

Model response and reasoning

The digital authorization is agreed; physical delivery remains unverified and needs a receiving check.

The buyer observation concerns the physical world. Repeating the ledger record cannot resolve missing receiving evidence.

Check: Separate the authorization from the delivery claim.

Source

Blockchain Technology Overview. The exercise inputs and model choices are fictional teaching examples.