English

5. the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.
8. of policy, argues that something should/should not be done, believed, banned; argues for a course of action.
12. an important topic or problem for debate or discussion.
13. a definite or clear expression of something in speech or writing.
14. the available body of facts or information indicating whether a belief or proposition is true or valid.
15. the circumstances that form the setting for an event, statement, or idea, and in terms of which it can be fully understood and assessed.
16. of fact, asserts that a condition has existed, exists, or will exist.
17. the process of making known one's thoughts or feelings.
18. a view or judgment formed about something, not necessarily based on fact or knowledge.
20. a definite or clear expression of something in speech or writing.

1. (of a disease) prevalent over a whole country or the world.
2. a thing that is known or proved to be true.
3. an exchange of diverging or opposite views, typically a heated or angry one.
4. the action or process of affirming or asserting something or being affirmed.
6. a confident and forceful statement of fact or belief.
7. of value, makes a judgement (subjective); expresses approval or disapproval about something; attempts to show that something is wrong/right, moral/immoral, beauty/ugly.
9. a written composition in prose, usually nonfiction, on a specific topic, forming an independent part of a book or other publication, as a newspaper or magazine.
10. the ability to make considered decisions or come to sensible conclusions.
11. an acceptance that a statement is true or that something exists.
19. not conforming to accepted standards of morality.