| Main Entry | R | I | S | M | B | C | N |
| Caird, Edward | X | X | |||||
| Caitanya | X | ||||||
| Calculus | X | ||||||
| Calkins, Mary Whiton | X | ||||||
| Callicles and Thrasymachus | X | ||||||
| Cambridge Platonists | X | X | X | ||||
| Cambridge School | X | ||||||
| Camenes | X | ||||||
| Camestres | X | ||||||
| Campanella, Tommaso | X | ||||||
| Camus, Albert | X | ||||||
| Canon | X | ||||||
| Cantor, Georg (Ferdinand Ludwig Philipp) | X | X | |||||
| Capacity | X | ||||||
| capital punishment | X | ||||||
| Capitalism | X | X | |||||
| Capitalists | X | ||||||
| Cardinal number | X | ||||||
| Cardinal Point and Value | X | ||||||
| Cardinal virtues | X | ||||||
| Carlyle, Thomas | X | ||||||
| Carnap, Rudolf | X | X | X | ||||
| Carneades | X | X | X | X | |||
| Cartesian dualism | X | ||||||
| Cartesian skepticism | X | ||||||
| Cartesianism | X | X | X | ||||
| Cassirer, Ernst | X | X | X | ||||
| Casualism | X | ||||||
| Casuistic | X | ||||||
| Casuistry | X | X | X | ||||
| Catechetic | X | ||||||
| Categorematic | X | ||||||
| Categorial | X | ||||||
| Categorical (Judgment) | X | ||||||
| Categorical Imperative | X | X | X | ||||
| categorical logic | X | ||||||
| categorical proposition | X | ||||||
| categorical syllogism | X | ||||||
| categorical term | X | ||||||
| categories | X | ||||||
| Category | X | X | X | X | |||
| category mistake | X | ||||||
| Category of Unity | X | ||||||
| category-theory | X | ||||||
| Catharsis | X | X | |||||
| Catvari arya-satyani | X | ||||||
| Causa sui | X | ||||||
| Causality | X | ||||||
| causation | X | ||||||
| causation, backward | X | ||||||
| causation, causal process | X | ||||||
| causation, in the law | X | ||||||
| causation, counterfactual | X | ||||||
| causation, Medieval theories of | X | ||||||
| causation, mental | X | ||||||
| causation, metaphysics of | X | ||||||
| causation, probabilistic | X | ||||||
| causation and manipulability | X | ||||||
| Cause | X | X | |||||
| cause / effect | X | ||||||
| causes, the four | X | ||||||
| Cause-theory (of mind, body) | X | ||||||
| Cavendish, Margaret | X | ||||||
| Celarent | X | ||||||
| censorship, pornography and | X | ||||||
| Centre-theory | X | ||||||
| Certainty | X | ||||||
| Certitude | X | X | |||||
| Cesare | X | ||||||
| chain of being | X | ||||||
| Ch'an wei | X | ||||||
| Chance | X | ||||||
| Ch'ang | X | ||||||
| Chang Heng-ch'u | X | ||||||
| Ch'ang sheng | X | ||||||
| Change, Philosophy of | X | X | |||||
| Chaos | X | ||||||
| Character | X | X | |||||
| Character, moral | X | ||||||
| Characteristic | X | ||||||
| Characteristica Universalis | X | ||||||
| Characterology | X | ||||||
| Characters | X | ||||||
| Charron, Pierre | X | ||||||
| Chen jen | X | ||||||
| Chen ts'a | X | ||||||
| Chen yun | X | ||||||
| Ch'eng | X | ||||||
| Cheng hsin | X | ||||||
| Ch'eng I-ch'uan | X | ||||||
| Cheng ming | X | ||||||
| Ch'eng ming | X | ||||||
| Ch'eng Ming-tao | X | ||||||
| Chi | X | ||||||
| Ch'i | X | ||||||
| Ch'i | X | ||||||
| Ch'i chia | X | ||||||
| Ch'i hsueh | X | ||||||
| Ch'i wu | X | ||||||
| Chia | X | ||||||
| Chiao | X | ||||||
| Chieh hsuan | X | ||||||
| Ch'ien | X | ||||||
| Chien ai | X | ||||||
| Chien pai | X | ||||||
| Chih | X | ||||||
| Chih chih | X | ||||||
| Chih jen | X | ||||||
| Chih kuo | X | ||||||
| Chih shan | X | ||||||
| Childhood, the philosophy of | X | ||||||
| Children, philosophy for | X | ||||||
| Chiliasm | X | ||||||
| Chin | X | ||||||
| Ch'in | X | ||||||
| Chin hsin | X | ||||||
| Chin tan | X | ||||||
| Chinese Philosophy | X | ||||||
| Chinese Room Argument | X | X | X | ||||
| Ching | X | ||||||
| Ch'ing | X | ||||||
| Ch'ing (dynasty) philosophy | X | ||||||
| Ching shen | X | ||||||
| Chisholm, Roderick | X | ||||||
| Chiu | X | ||||||
| Chiu ch'ou | X | ||||||
| Ch'iung li | X | ||||||
| Choice | X | ||||||
| Choice, axiom of | X | ||||||
| Chomsky, Noam | X | X | |||||
| Chou Tun-i | X | ||||||
| Chrematistiscs | X | ||||||
| Christian doctrine | X | ||||||
| Christian theology, philosophy and | X | ||||||
| Christianity | X | ||||||
| Christology | X | ||||||
| Chrysippus | X | X | X | ||||
| Chu | X | ||||||
| Chu Hsi | X | ||||||
| Chu i wu shih | X | ||||||
| Ch'uan | X | ||||||
| Ch'uan hsing | X | ||||||
| Ch'uan sheng | X | ||||||
| Chuang Tzu | X | ||||||
| Chun tu | X | ||||||
| Chung | X | ||||||
| Chung yung | X | ||||||
| Church, Alonzo | X | X | |||||
| Churchland, Patricia | X | ||||||
| Churchland, Paul | X | ||||||
| Church-Turing Thesis | X | ||||||
| Cicero | |||||||
| Cicero, Marcus Tullius | X | X | X | ||||
| Circular evidence | X | ||||||
| circularity | X | ||||||
| Cit | X | ||||||
| Citi | X | ||||||
| Citta | X | ||||||
| civil rights | X | ||||||
| Cixous, Hélène | X | ||||||
| Claims | X | ||||||
| Clarification | X | ||||||
| Clarke, Samuel | X | X | |||||
| Class | X | X | |||||
| Class concept | X | ||||||
| Class consciousness | X | ||||||
| Class struggle | X | ||||||
| Classic | X | ||||||
| Classicism | X | X | |||||
| Classification | X | ||||||
| Cleanthes | X | X | |||||
| clear and distinct | X | ||||||
| Clearness | X | ||||||
| Clement of Alexandria | X | ||||||
| Clifford, W. K. | X | ||||||
| closure principles | X | ||||||
| Cockburn, Catherine | X | X | |||||
| Co-conscious, The | X | ||||||
| Coenaesthesis | X | ||||||
| Cogitatio | X | ||||||
| Cogito | X | ||||||
| Cogito Argument, The | X | ||||||
| cogito ergo sum | X | ||||||
| Cognition | X | X | |||||
| Cognitive Meaning, Cognitive Sentence | X | ||||||
| cognitive science | X | X | X | ||||
| cognitivism | X | ||||||
| cognitivism vs. non-cognitivism, moral |