Descartes (1596–1650) and his Evil Demon, sometimes also called his 'Evil Genius' George Berkeley (1685–1753) and his "immaterialism" (later referred to as subjective idealism by others) References Bibliography External links Software architecture Concepts in epistemology Concepts in metaphysics Science fiction themes Philosophical theories Thought experiments Internalism and externalism Philosophy of mind Simulated reality Mixed reality Reality by type