sentences:  In expository writing, unintentional obfuscation usually occurs in draft documents, at the beginning of composition; such obfuscation is illuminated with critical thinking and editorial revision, either by the writer or by an editor.Etymologically, the word "obfuscation" derives from the Latin , from "obfuscāre" (to darken); synonyms include the words beclouding and abstrusity.Doctors are faulted for using jargon to conceal unpleasant facts from a patient; the American author and physician Michael Crichton said that medical writing is a "highly skilled, calculated attempt to confuse the reader".