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id course-da-visualization-l05
type course
title Challenge 05: Honest boundary
summary The suite checks files and numbers — not readability or honest scales; state what was not verified.
lang en-US
content_version 1
status reviewed
reviewed_on 2026-09-12
hints
title body
What this checkpoint tests
Naming what verification cannot see: the suite checks files exist, are real PNGs, and numbers match — it does not judge readability, scale honesty, or design.
title body
Write the boundary sentence
One sentence stating what was verified (files, PNG validity, numbers) and what was not (whether the chart tells the truth visually) completes this checkpoint.
title body
Carry it forward
The same boundary applies to every automated check you will ever write: state what it proves and what it does not.

Challenge 05: Honest boundary

Gate: self-attested · Points: 10

The verifier checks files exist, are real PNGs, and that summary numbers are right. It does not check that the chart is readable, honest in scale, or well-designed — a misleading y-axis passes the suite.

Write one sentence you would attach to these charts stating exactly what was and was not verified.

Checkpoint: you have that sentence written down. Self-attested; record via python verify.py.