#data contamination

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A document-clearance desk with a scanner mid-pass over a printed source page, a hash-comparison screen beside it, in a bright daylight office

How Training Data and Synthetic Data Actually Work

Filtering, deduplication, provenance and contamination testing are not housekeeping around a model — they are most of what determines what it becomes.

By Brecht Corbeel · September 16, 2026 · 14 min read

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