John Norton also gave his own argument known as the Gap Argument. This argument stated that to date, there is no evidence that can determine the content of a scientific theory. However since there is universal agreement on the content of scientific theories, then there is a gap where some agreements cannot be explained by evidence. This seems to undermine the under determination thesis [[CiteRef::Okasha, de Regt, and Hartmann (Eds.) (2009)]]
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