*Some of these glossary definitions have been adapted and reproduced by permission of The American Heritage Dictionary of the English Language, Fourth Edition. Copyright © 2002 by Houghton Mifflin Company. Many computer and Web-related definitions have been contributed by Jason Snart, College of DuPage.

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vague word A word that lacks a clear and distinct meaning.

valid argument An argument in which the reasons support the conclusion so that the conclusion follows from the reasons offered.

values Beliefs regarding what is most important to an individual or a group.