Another reason for the heavy weight given to official sources is that the mass media claim to be “objective” dispensers of the news. Partly to maintain the image of objectivity, but also to protect themselves from criticisms of bias and the threat of libel suits, they need material that can be portrayed as presumptively accurate.64 This is also partly a matter of cost: taking information from sources that may be presumed credible reduces investigative expense, whereas material from sources that are not prima facie credible, or that will elicit criticism and threats, requires careful checking
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