Newspapers generally adhere to an expository writing style. Over time and place, journalism ethics and standards have varied in the degree of objectivity or sensationalism they incorporate. It is considered unethical not to attribute a scoop to the TamilRockers Proxy journalist who broke a story, even if they are employed by a rival organization. Definitions of professionalism differ among news agencies; their reputations, according to both professional standards and reader expectations, are often tied to the appearance of objectivity. In its most ideal form, news writing strives to be intelligible to the majority of readers, engaging, and succinct. Within these limits, news stories also aim to be comprehensive.