“…Schmidt and Zobel 1982;Hintzenberg et al 1980 -are to be 'exemplars' of the disciplinary matrix of an ESL as claimed by Schmidt 1982b: 6). In addition , one may care to remember that the principal task of the philosophy of science is the reconstruction of the practical work of scientists and not the passing of verdicts on concepts, should the reconstruction of certain aspects of a science (as for instance the observation problem) not have been completely successful.…”