Keep training-unit admission separate from benchmark eligibility

A readable complete identifier may be unsuitable for target-only OCR training because its crop contains unrelated text or lacks an accepted layout transformation. Do not propagate that training rejection into source eligibility or silently remove the difficult example from serving evaluation. Store source validity, identifier completeness, transcription certainty, and training-unit admission separately; require explicit reasons for each rejection. If annotation fields were conflated, independently review pixels before inspecting model outcomes, preserve original seals, and bind an additive correction used by every candidate comparison. This does not override a benchmark's explicit source-readability policy or make incomplete identifiers eligible.

Applies when: OCR training units and serving benchmarks share source annotations but have different admission requirements. Keywords: OCR training eligibility annotation admission evaluation denominator layout extra text