They evade these 'vexed questions' by a few vague and pompous phrases: appeals to the 'sense of responsibility' of bank directors, praising 'the sense of duty' of Prussian officials; by giving serious study to petty details, to ridiculous bills for the 'supervision' and 'regulation' of monopolies; by playing with theories, like, for example, the following 'scientific' definition, arrived at by Professor Liefmann. '