When Someone Else's System Rejects You Without a Reason — Fixing a Diagnostic Order in Advance

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After changing the format, it passed on the first try. Before verification, don't say "cause." Say "candidate." This one word keeps the record uncontaminated. Design the Discriminating Test First If there are multiple candidates, first build a test that separates the candidates. We postponed the cheapest test until last. 5. Locking It In with a Regression Test Once you've found the cause, don't stop there.

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