The Enduring Questions: Main Problems of Philosophy

abstract action animals Anytus appear argument Aristotle B. F. Skinner believe body called categorical imperative cause ceived certainly colors conceive conception consequences consider deny Descartes desire determined distinct doctrine doubt duty effect Ernest Nagel ethics everything existence existentialist experience external fact false feel Glaucon happiness Hegel Hence human Hume idea ideal imagination imperative individual inference John Stuart Mill Kant kind knowledge living logical Martin Buber matter means Meletus ment mental metaphysics method mind monism moral motion nature necessity ness never objects opinion pain Peirce perceived perceptions person Phil philosophy physical Plato pleasure possible principle produce propositions pure question rational reality reason regard relation rule scientific scientific method seems sensation sense sense-data social Socrates soul space suppose theory things thou thought tion true truth University utilitarian virtue whole word