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A function f assigning to each vertex a positive integer rank is a ranking iff for any k , any path joining two vertices of rank k necessarily passes through a vertex of rank less than k. To teach evolution as true would be a denial of the scientific method because it would be saying the scientific method necessarily implies evolution is true when that clearly is n't true . However , no specific , tangible end-product necessarily results in the use of a consultant other than a report or a presentation . The right of prior informed consent necessarily includes the right to reject projects unless they meet community interests .