. "What is and what ought to be done : An essay on ethics and epistemology" . . . . . . . "What is and what ought to be done : an essay on ethics and epistemology" . "What is and what ought to be done : an essay on ethics and epistemology"@en . . "What is and what ought to be done an essay on ethics and epistemology"@en . . . . . . . "Was ist und was getan werden sollte : ein Essay über Ethik und Erkenntnistheorie" . . . . . . "What Is and What Ought To Be Done : an Essay on Ethics and Epistemology" . . . . . . . . . . . . . . . . . . . . . . . "What is and what ought to be done" . . "Ètica." . . "Ética." . "Kennistheorie." . . "Knowledge, Theory of." . . "Erkenntnistheorie." . . "Épistémologie." . . "Jugement (morale)" . . "Ethics." . . "Neopragmatismus." . . "Ethiek." . . "Théorie de la connaissance." . . "Korporatismus <Philosophie>" . . . . "Morale." . . "morale." . "épistémologie morale." . . "Erkenntnis." . . "Politische Ethik." . . "Connaissance, Théorie de la." . . "Epistemología." . . "Ethik." . .