"A valid criticism of my theory," Spock said.

There has been much criticism of Kondrashov's theory, since it relies on two key restrictive conditions.

Some of the criticism of Dennett's theory is due to the perceived tone of his presentation.

One criticism of Mezirow's theory is its emphasis upon rationality.

Tumin, their most famous opponent, has produced a comprehensive criticism of their theory.

At 23 he came into prominence by a vigorous criticism of Thomas Hobbes' theory on civil power.

There have been several criticisms and reviews of Barnett's theory, including:

One possible criticism of Eliot's theory includes his assumption that an author's intentions concerning expression will be understood in one way only.

In the 2000 edition of the book, Friedman answered criticism of his theory as follows:

It explores the criticism of Justice Holmes's theory of legal positivism.