A school-lunch allergy data class has both valid and invalid partitions, but a GenAI-generated pack covers only the valid band and misses the invalid one. Which metric best names this gap?

Short Explanation

Missing the invalid partition is a completeness miss—that’s recall. You didn’t find all the relevant instances the data class required.

Full Explanation

Recall is the ability to identify all relevant instances—for example, covering both valid and invalid partitions. It is not runtime speed, styling, training cost, or confidence theater.

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