Fortunately, the use of diverse perspectives to criticize hypotheses can turn some of those hypotheses into scientific knowledge. Hypotheses become knowledge when they are subjected to scrutiny from diverse perspectives, especially by those with diverse beliefs and values. In contrast to those philosophers who would point to the two evidential gaps above to argue that science is not objective therefore, Longino argues that scrutiny by those with diverse values can instead support the objectivity of science. Accordingly, our values which do not immediately seem to have anything to do with science are crucial to the objectivity of pieces of scientific knowledge, and science can be objective precisely because it is not value-free. From this viewpoint, dissent is important in testing the adequacy of our grounds for accepting a theory. Open critical dialogue within a community can potentially enable the community to overcome bias. To attain objectivity, science must permit and engage with "transformative criticism".