 This definition has the advantages of (i) being applicable across disciplines with highly different methodologies and (ii) allowing for a statement to be pseudoscientific at present although it was not so in an earlier period (or, although less commonly, the other way around). (Hansson 2013) At the same time it removes the practical determination whether a statement or doctrine is pseudoscientific from the purview of armchair philosophy to that of scientists specialized in the subject-matter that the statement or doctrine relates to. Philosophers have usually opted for demarcation criteria that appear not to require specialized knowledge in the pertinent subject area. 