Such a code of conduct can, in the real world, be difficult to uphold consistently. Journalists who believe they are being fair or objective may give biased accounts—by reporting selectively, trusting too much to anecdote, or giving a partial explanation of actions. (See Media bias.) Even in routine reporting, bias can creep into a story through a reporter's choice of facts to summarize, or through failure to check enough sources, hear and report dissenting voices, or seek fresh perspectives.