Unit

"A unit is an existent regarded as a separate member of a group of two or more similar members" (ITOE p. 6). Implicit in the concept "unit" is the identification of a group, composed of a more than one existent. The important distinction between existent and unit is that an existent is independent of cognition, whereas the unit is the product of a consciousness "focusing on a particular attribute of the objects ..., then isolating them according to their differences, and integrating them as units into separate groups according to their similarities". (ITOE p. 6)

See also

Measurement omission