Based on your perception of Logic, what is valuable about the uses of language?

Based on your perception of Logic, what is valuable about the uses of language? Does language include Verbal and Non Verbal? Which is most effective?
Language is used in the areas of correct thinking, discernment and the understanding of the human person as a rational being. The three distinct uses of language are: 1) informative, 2) expressive and 3) directive.
You will submit a 2-3 page report on the above statements/questions. In order to develop your paper you will: Read the information you find and provide examples of each of the uses of language. (http://www.philosophypages.com/lg/index.htmLinks to an external site.)
Other recommended sites: http://philosophy.hku.hk/think/logic/whatislogic.phpLinks to an external site., http://www.philosophicalsociety.com/logic.htmLinks to an external site.