2 K R Popper (1963), Conjectures and refutations: the growth of scientific knowledge, published 2002 by  Routledge, p. 501. 3 J Gauck, Europe: renewing confidence – strengthening commitment, speech on the prospects for the European  idea, on 22 February 2013 at Schloss Bellevue.
4 J Brunsden and K Hope, Athens told to stick to reforms or risk losing vital investment, Financial Times, 31 July  2018. 5 See ABresson (2016), The making of the ancient Greek economy – institutions, markets, and growth in the city-  states, Princeton University Press. 6 See, for example, D M MacDowell (2004), Demosthenes, Speeches 27–38, Against Zenothemis.