Data flow scenarios — CCA-F Exam Prep

A resume screening system scored two-column resumes 40% lower than single-column resumes with identical content. The team spent two weeks trying to fix Claude's 'bias.' The bug wasn't in Claude.

The PDF-to-text converter read left-to-right, top-to-bottom. A two-column layout got interleaved: 'John Smith 5 years Python experience Senior Engineer at Django Flask.' Claude scored gibberish input low -- correctly. The bug was in the input conversion, not in Claude's evaluation.