Decisions on the content and editorial processes of Wikipedia are made largely through consensus decision-making and, occasionally, by voting; Jimmy Wales and the Wikimedia Foundation retain final judgement. Wikipedia has several policies and guidelines, also developed through consensus, that guide activity on the project, covering behavioural, content-related and legal issues. One of the most important states that articles must be written from a ""neutral point of view"", presenting all noteworthy perspectives on an issue along with the evidence supporting them — thus, rather than aspiring to determine the objective truth of their subjects, articles attempt to describe them impartially from all significant viewpoints. Individual edits that contain libelous statements, copyright violations, and other content that could incur legal liability or be otherwise detrimental to Wikipedia are permanently hidden from view using a process called ""Oversight"".