Malignant narcissism is a theoretical, experimental diagnostic category.

As Professor Ritter sees it, the companies with low sales do not fall neatly into the theoretical categories that academics use to account for different stocks' performances.

Similarly, though Foucault is often invoked, there is a marked tendency to continue to utilize theoretical categories such as ideology, consciousness and the subject.

He argues that "theoretical categories, and their inter-relations construe an abstract model of language...; they are interlocking and mutually defining".

Courses fall into two main categories: theoretical and practical.

Regional identity is a theoretical category which as such is not of much obvious importance for one's everyday life.

Halliday follows Hjelmslev and Firth in distinguishing theoretical from descriptive categories in linguistics.

Halliday contrasts theoretical categories with descriptive categories, defined as 'categories set up in the description of particular languages'.

Mr. Baudrillard was once considered a postmodern guru, but his analyses of modern life were too original and idiosyncratic to fit any partisan or theoretical category.

Not only was this theoretical category absent, there was no body of law governing the administration of public affairs.