G.E. Moore is often remembered for his exposition of the the ',naturalistic fallacy,', which he explained in ",Principia Ethica", by thrashing the views of Herbert Spencer, in particular. , In this book, Moore addresses questions such as ",What is ',good',?", and ",How can one know?", , Utilitarianism offered one answer, which Moore did not find fully satisfactory. , Moore',s arguments illustrate that something one may have thought was completely self-evident, that is, the nature of ',good,', is not as clear cut as one may believe._, Usado-NUEVO