theory

01. Einstein's famous [theory] that E = mc2 has been shown to be true by modern physics.

02. I studied practical linguistics to become an ESL teacher, but some other people in my classes were studying [theoretical] linguistics in order to do research.

03. [Theoretically] speaking, the planet Mars appears to have had most of the conditions necessary to support simple life forms at least at some point in time, but no evidence of life past or present has yet been found on the planet.

04. Einstein once remarked: "If the facts don't fit the [theory], change the facts."

05. Mark Russell once joked, "The scientific [theory] I like best is that the rings of Saturn are composed entirely of lost airline luggage."

06. Efforts to solve global problems often require broad [theoretical] understanding of cultural systems, as well as detailed understanding of specific local cultures.

07. The notion of the Big Bang [theorizes] that the universe began as a huge explosion of matter.

08. In 1872, a professor of physiology said that Louis Pasteur's [theory] of germs was a ridiculous fiction.

09. Einstein said that a unified super-[theory] of everything would enable us to "read the mind of God."

10. Someone once joked, "Given a choice between two [theories], take the one which is funnier."

11. There are some holes in his [theory] which haven't been explained as of yet.

12. We will be examining three [theoretical] perspectives on the question during the next few days.

13. Benedict Spinoza once said that if facts conflict with a [theory], either the [theory] must be changed or the facts.

14. Current [theories] trace our first human ancestor to Africa about 5 to 7 million years ago.

15. Someone once remarked that the quickest way to kill a good [theory] is to put it into practice.

16. Current [theory] in anthropology holds that Neandertals became extinct only 30,000 years ago, and co-existed with modern humans in Europe.

17. Friedrich Engels once noted that an ounce of action is worth a ton of [theory].

18. Many [theorists] now believe that vocabulary development is even more important than grammar study for second language learners.

19. A leading political [theorist] suggests that despite opposition to the plan, the government has no choice but to proceed with legislation.

20. Musical [theorists] of the Middle Ages worked hard to develop an adequate musical notation.

21. Whether the Romans made any significant contributions to the [theory] or practice of music is unknown.

22. The notion that human beings are systematically taught how to behave, feel and think is the basis of sociological [theory].