Knowledge, Theory of Philosophy 339 epistemology 238 History 175 Epistemology 159 Science 155 Metaphysics 104 more ... Logic 77 Ethics 74 Reason 73 Methodology 69 Philosophy of mind 60 Ontology 54 Philosophy of Science 54 Science—Philosophy 54 Causation 51 Truth 50 Belief and doubt 48 Phenomenology 47 Skepticism 40 Cognition 39 Language and languages 35 Philosophy, Modern 34 Realism 34 Perception (Philosophy) 33 Education 32 Social aspects 32 Thought and thinking 29 Intellect 26 Research 26 less ...