For example, feminist theorists have used the term "womyn" instead of "women."

Expanding on the methods of musical set theory, some theorists have used abstract algebra to analyze music.

In time, theorists used this and other evidence to develop the "standard model" theory.

Different theorists use different labels for the two general types and distinguish them in different ways.

First, theorists have traditionally used the same integers to indicate elements of different tuning systems.

Other theorists have used it for various other intervals.

Some theorists have used semiotic models in empirical studies of the construction of meaning in urban environments.

Serious theorists, like Henry Kissinger, used it to form war strategies.

Social-learning theorists use similar concepts, but focus on cognitive activity and modeling.

Other theorists may use the Possible World framework to express and explore problems without committing to it ontologically.