логика экстенсиональный; объёмный
adjective 1. of, relating to, or marked by extension; specifically denotative 2. concerned with objective reality • extensionality noun • extensionally adverb
Extensional properties, e.g. extensional equality, relate to the "black-box" behaviour of an object, i.e. how its output depends on its input. The opposite is intensional which concerns how the object is implemented.