The theory on which Mr. Fell hangs his tale concerns the identity of, among others, the Dark Lady of the sonnets.

Bourdieu's theory of heterodoxy/orthodoxy also concerns the representations or habitus of social agents.

His theory concerned the staging of dialectics, something he tried out and tested at the Berliner Ensemble.

Aesara's theory of natural law concerns three applications of morality, concerning the individual, the family, and social institutions.

The theory concerns the relative strength of memories over time, which is not directly testable.

Another theory concerned the role a dry climate might play in encouraging the growth of Clostridium sordellii, which lives in soil.

Esther's theory merely concerned the religious folly and brutality of humans.

The theory mainly concerns improving economic efficiency, especially labour productivity.

This theory concerns the authority generated by people's knowledge and the power such authority has to shape people's opinions in daily life.

The new theory concerns a family of chemicals called cholinesterase inhibitors that short-circuit some nerve signals.