 a priori justification and knowledge |  consciousness: unity of |  Descartes, René |  functionalism |  idealism |  Kant, Immanuel |  Kant, Immanuel: and Hume on causality |  Kant, Immanuel: and Hume on morality |  Kant, Immanuel: philosophy of science |  Kant, Immanuel: transcendental arguments |  Leibniz, Gottfried Wilhelm |  Reid, Thomas |  self-consciousness 