true negative

The glossary is being gradually proof checked, but currently has many typos and misspellings.

A true negative is when a classification or decision system says that an item is not in a class and it is correct, that is it really is not in the class.

This is in contrast to with a false negative, a true positive or a false positive.

Used in Chap. 9: pages 121, 129

Used in glossary entries: classification, false negative, false positive, true positive