DE[EN]
ground truthGroundtruth
also: Grundwahrheit

The information provided by direct observation and measurement that is known to be real or true.

ISO/IEC DIS 22989 value of the target variable for a particular item of labelled input data

Note 1 to entry: Ground truth is not always the same as absolute truth.

ISTQB - CTAI Syllabus The information provided by direct observation and measurement that is known to be real or true