| Main Entry | R | I | S | M | B | C | N |
| Saadia, ben Joseph | X | ||||||
| Saadiah [Saadya], Gaon | X | X | |||||
| Sabda | X | ||||||
| Sabellianism | X | ||||||
| Sacerdotalism | X | ||||||
| Sadducee-ism | X | ||||||
| Saguna | X | ||||||
| Saint-Simon, Claude Henry, Count De | X | X | |||||
| Sakti | X | ||||||
| salva veritate | X | ||||||
| salvation | X | ||||||
| Samadhi | X | ||||||
| Samanya | X | ||||||
| Same and Other | X | ||||||
| Samnyasin | X | ||||||
| Samsara | X | ||||||
| Samskara | X | ||||||
| San cheng | X | ||||||
| San chiao | X | ||||||
| San kang | X | ||||||
| San piao | X | ||||||
| Sanction | X | ||||||
| sanction, moral | X | ||||||
| Sanga | X | ||||||
| Sankara | X | ||||||
| Sankhya | X | ||||||
| Sankhya-karika | X | ||||||
| Santayana, George | X | X | X | ||||
| Sartre, Jean Paul | X | X | |||||
| Sarva-darsana-sangraha | X | ||||||
| Sarvakartrtva | X | ||||||
| Sarvam khalv idam brahma | X | ||||||
| Sarvasti-vada | X | ||||||
| Sastra | X | ||||||
| Sat | X | ||||||
| Sat-cit-ananda, saccidananda | X | ||||||
| Satire | X | ||||||
| satisficing | X | ||||||
| Sattva | X | ||||||
| Satya | X | ||||||
| Satyagraha | X | ||||||
| Saussure, Ferdinand de | X | ||||||
| Sautrantika | X | ||||||
| Scepticism [Skepticism] | X | X | X | ||||
| Scepticism, Fourteenth Century | X | ||||||
| Scheler, Max | X | ||||||
| Schelling, Friedrich Wilhelm Joseph von | X | X | X | ||||
| Schema | X | X | |||||
| Schiller, Ferdinand Canning Scott | X | ||||||
| Schiller, Friedrich | X | ||||||
| Schism | X | X | |||||
| Schleiermacher, Friedrich Ernst Daniel | X | X | X | ||||
| Schlick, Moritz | X | X | |||||
| Scholasticism | X | X | X | X | |||
| Schopenhauer, Arthur | X | X | X | ||||
| Schröder, (Friedrich Wilhelm Karl) Ernst, | X | ||||||
| Schrodinger, Erwin | X | ||||||
| Schutz, Alfred | X | ||||||
| science and the Church | X | ||||||
| Science of Science | X | ||||||
| Science, philosophy of | X | ||||||
| scientia | X | ||||||
| Scientific Empiricism; Unity of Science Movement | X | ||||||
| scientific explanation | X | ||||||
| scientific knowledge, social dimensions of | X | ||||||
| scientific method | X | ||||||
| scientific progress | X | ||||||
| scientific realism | X | ||||||
| scientism | X | ||||||
| Scotism | X | X | |||||
| Scottish philosophy | X | ||||||
| Scottish philosophy, in the 18th Century | X | ||||||
| Scottish philosophy, in the 19th Century | X | ||||||
| Scotus, John Duns | X | ||||||
| Searle, John | X | X | |||||
| secession | X | ||||||
| Secondary Qualities | X | X | |||||
| sect and sects | X | ||||||
| secularism | X | ||||||
| Secunda Petri | X | ||||||
| Secundi adjacentis | X | ||||||
| Secundum quid | X | X | |||||
| Selective Theories of Sensa | X | ||||||
| Self | X | ||||||
| Self-Consciousness | X | ||||||
| Self-Consciousness, phenomenological approaches to | X | ||||||
| self-deception | X | ||||||
| self-defense | X | ||||||
| Self-determination | X | ||||||
| Self-Evidence | X | X | |||||
| Selfhood | X | ||||||
| Self-knowledge | X | ||||||
| Self-love | X | ||||||
| Self-Realization | X | ||||||
| Sellars, Wilfrid | X | X | X | ||||
| Selves, Knowledge of other | X | ||||||
| semantic theory | X | ||||||
| Semantics | X | X | X | ||||
| semantics, functional role | X | ||||||
| semantics, naturalized | X | ||||||
| Semasiology | X | ||||||
| Semiosis | X | ||||||
| Semiotic; Theory of Signs | X | ||||||
| semiotics | X | ||||||
| semiotics, Medieval | X | ||||||
| Semi-Pelagianism | X | ||||||
| Sempiternal | X | ||||||
| Sempiternity | X | ||||||
| Seneca | X | X | |||||
| Sensa | X | ||||||
| Sensation | X | X | |||||
| Sensationalism | X | X | |||||
| sense | X | ||||||
| sense / reference | X | ||||||
| Sense and denotation | X | ||||||
| Sense Datum | X | X | X | ||||
| Sense Manifold | X | ||||||
| Sense, internal | X | ||||||
| Sensibility | X | ||||||
| Sensing | X | ||||||
| sensualism | X | ||||||
| Sensum | X | ||||||
| Sensum-Theory | X | ||||||
| Sentence | X | ||||||
| Sentences (Scholastic) | X | ||||||
| Sentential calculus | X | ||||||
| Sentential function | X | ||||||
| Sentience | X | ||||||
| Sentimentalism | X | ||||||
| set theory | X | ||||||
| Seth Pringle-Pattison | X | ||||||
| Sextus Empiricus | X | X | |||||
| Shaftesbury, Anthony Ashley Cooper, Third Earl of | X | X | X | X | |||
| Shaktism, Saktism | X | ||||||
| Shamanism | X | ||||||
| Shan | X | ||||||
| Shang ti | X | ||||||
| Shang t'ung | X | ||||||
| Shannon, Claude | X | ||||||
| Shao K'ang-chieh | X | ||||||
| Shao vin | X | ||||||
| Shao yang | X | ||||||
| Sharpe, Johannes | X | ||||||
| Sheffer stroke | X | ||||||
| Shen | X | ||||||
| Shen Jen | X | ||||||
| Shen tu | X | ||||||
| Sheng (jen) | X | ||||||
| Shih | X | ||||||
| Shih | X | ||||||
| Shih fei | X | ||||||
| Shiites | X | ||||||
| Shiva, Siva | X | ||||||
| Shivaism, Sivaism, Saivism | X | ||||||
| short term memory | X | ||||||
| Shpet, Gustav | X | ||||||
| Shu | X | ||||||
| Shu shu | X | ||||||
| Shuo | X | ||||||
| Sibylline Books | X | ||||||
| Siddhi | X | ||||||
| Sidgwick, Henry | X | X | X | ||||
| Siger of Brabant | X | ||||||
| Sign | X | ||||||
| Signate | X | ||||||
| Signification | X | ||||||
| Signifies | X | ||||||
| Sign-Language | X | ||||||
| silicon chip replacement | X | ||||||
| Similarity, Law of | X | ||||||
| Similia similibus percipiuntur | X | ||||||
| Similitude) (Scholastic) | X | ||||||
| Simmel, Georg | X | ||||||
| Simon of Faversham | X | ||||||
| Simon, Herbert | X | ||||||
| Simple Enumeration | X | ||||||
| simpliciter | X | ||||||
| simplicity | X | ||||||
| Simplicius | X | ||||||
| Simplification (Simp.) | X | ||||||
| Simpson's paradox | X | ||||||
| Simulacrum | X | ||||||
| Simultaneity | X | ||||||
| sin | X | ||||||
| sine qua non | X | ||||||
| Singer, Peter | X | ||||||
| Singular proposition | X | X | |||||
| Singular terms, medieval theories of | X | ||||||
| Sinn / Bedeutung | X | ||||||
| Skepticism [scepticism] | X | X | X | X | X | ||
| skepticism, ancient Greek | X | X | |||||
| skepticism, Cartesian | X | ||||||
| skepticism, contemporary | X | ||||||
| skepticism, modern | X | ||||||
| skepticism, moral | X | ||||||
| Skinner, B. F. | X | ||||||
| Skolem paradox | X | ||||||
| slavery, ethical aspect of | X | ||||||
| Smart, J.J.C. | X | ||||||
| Smith, Adam | X | X | |||||
| Social Contract | X | X | X | X | |||
| Social Contract, contemporary approaches to | X | ||||||
| social Darwinism | X | ||||||
| social democracy | |||||||
| social minimum [basic income] | X | ||||||
| socialism | X | ||||||
| Socialism, Marxian | X | ||||||
| Socinians | X | ||||||
| Sociology | X | ||||||
| Sociology of Law | X | ||||||
| Socrates | X | X | X | ||||
| Socratic method | X | ||||||
| Socraticism | X | ||||||
| Solipsism | X | X | X | X | |||
| Solovyov, Vladimir | X | ||||||
| Soma | X | ||||||
| Somatic | X | ||||||
| Somatic Datum | X | ||||||
| Some | X | ||||||
| Sophía (sofia) | X | X | |||||
| Sophism | X | X | |||||
| Sophismata | X | ||||||
| Sophistic | X | ||||||
| Sophistici Elenchi | X | ||||||
| Sophists | X | X | X | X | |||
| Sophocracy | X | ||||||
| sophrosúnê (swfrosunh) | X | ||||||
| Sorge | X | ||||||
| Sorites | X | X | |||||
| sorites paradox | X | ||||||
| Soul | X | X | X | ||||
| Soul (Scholastic) | X | ||||||
| soul, ancient theories of | X | ||||||
| soul, faculties of the | X | ||||||
| Soul-Substance Theory | X | ||||||
| sound / unsound | X | ||||||
| sounds | X | ||||||
| Souvré, Madeleine de | X | ||||||
| sovereignty | X | ||||||
| Soviet philosophy | X | ||||||
| Space | X | ||||||
| space and time, being and becoming in modern physics | X | ||||||
| space and time, conventionality of simultaneity | X | ||||||
| space and time, the hole argument | X | ||||||
| space and time, inertial frames | X | ||||||
| space and time, supertasks | X | ||||||
| Space, homogeneous | X | ||||||
| Space-perception | X | ||||||
| Space-Time | X | ||||||
| Species | X | X | |||||
| Specificative | X | ||||||
| Specious Present | X | ||||||
| Speculative Idealism | X | ||||||
| Speculum | X | ||||||
| speech act | X | ||||||
| Speech Situation | X | ||||||
| Spencer, Herbert | X | X | X | ||||
| Spens, Will | X | ||||||
| Speusippus | X | ||||||
| Sphaeriker | X | ||||||
| Spinoza, Benedict (Baruch) | X | X | X | ||||
| Spinoza's psychological theory | X | ||||||
| Spinozism | X | ||||||
| Spir, African | X | ||||||
| Spirit | X | X | |||||
| Spiritism | X | ||||||
| Spiritual Realism | X | ||||||
| Spiritualism | X | X | X | ||||
| Spiritus rector | X | ||||||
| Spontaneity | X | ||||||
| Spranger, Eduard | X | ||||||
| square of opposition | X | X | |||||
| Ssu | X | ||||||
| Ssu chiao | X | ||||||
| Ssu te | X | ||||||
| Ssu tuan | X | ||||||
| St. Louis School of Philosophy | X | ||||||
| St. Petersburg paradox | X | ||||||
| Staël, Madame de | X | ||||||
| standard form | X | ||||||
| Stanton, Elizabeth Cady | X | ||||||
| State | X | ||||||
| State and Church | X | ||||||
| State of Nature | X | ||||||
| Statement | X | X | |||||
| statement constant | X | ||||||
| statement form | X | ||||||
| statement variable | X | ||||||
| states of affairs | X | ||||||
| statistical physics | |||||||
| statistical physics, Boltzmann's work in | X | ||||||
| statistical physics, philosophy of statistical mechanics | X | ||||||
| Statistics | X | ||||||
| Stephen, Leslie | X | ||||||
| Stern, William | X | ||||||
| Stevenson, C. L. | X | ||||||
| Stewart, Dugald | X | ||||||
| Stheme | X | ||||||
| Stilpo | X | ||||||
| stipulative definition | X | ||||||
| Stirling, James Hutchison | X | ||||||
| Stirner, Max | X | X | |||||
| Stoic School | X | ||||||
| Stoicism | X | X | X | X | X | ||
| Strato | X | ||||||
| Strauss, David Friedrich | X | ||||||
| Strawson, P.F. | X | ||||||
| Stream of Consciousness or Thought | X | ||||||
| Strict implication | X | ||||||
| Structural Psychology | X | ||||||
| Structural Theories of Mind | X | ||||||
| Structuralism | X | X | |||||
| Struggle For Existence | X | ||||||
| Stuff, Neutral | X | ||||||
| Stumpf, Carl | X | ||||||
| Sturm und Drang | X | ||||||
| Su | X | ||||||
| Su p'u | X | ||||||
| Suarez, Francisco | X | ||||||
| Suarezianism | X | ||||||
| sub specie aeternitatis | X | ||||||
| Subalternation | X | X | |||||
| Subclass | X | ||||||
| Subconscious Mind | X | ||||||
| Subcontrary | X | X | |||||
| Subject | X | ||||||
| subjective | X | ||||||
| Subjective Idealism | X | ||||||
| Subjective rightness | X | ||||||
| Subjectivism | X | X | |||||
| Subjectivism, epistemological | X | ||||||
| subjectivity | X | ||||||
| Sublimation | X | ||||||
| sublime | X | X | |||||
| Subliminal | X | ||||||
| Subsistents | X | ||||||
| Substance | X | X | X | ||||
| Substance Theory of Mind | X | ||||||
| substance, dualism | X | ||||||
| substantialism | X | ||||||
| Substantive States | X | ||||||
| Substantive Theory of Mind | X | ||||||
| Substitution, rule of | X | ||||||
| substitution-instance | X | ||||||
| Substratum | X | ||||||
| Subsumption | X | ||||||
| Succession and Duration | X | ||||||
| Sufficient condition | X | X | |||||
| Sufficient Reason, Principle of | X | ||||||
| Sufism | X | ||||||
| Sui generis | X | X | |||||
| suicide | X | X | X | ||||
| Sukha-duhkha | X | ||||||
| Summa (Scholastic) | X | ||||||
| Summation, Psychic | X | ||||||
| Summists | X | ||||||
| Summum Bonum | X | X | |||||
| Summum Genus | X | ||||||
| Sunnites | X | ||||||
| Sunya-vada | X | ||||||
| Supererogation | X | X | X | ||||
| supererogatory | X | ||||||
| Superman | X | ||||||
| Supernatural | X | ||||||
| supertasks | X | ||||||
| supervenience | X | ||||||
| supervenient | X | ||||||
| Suppositio | X | ||||||
| Suppositio discreta | X | ||||||
| Suppositio materialis | X | ||||||
| Suppositio naturalis | X | ||||||
| Suppositio personalis | X | ||||||
| Suppositio simplex | X | ||||||
| Supposititious | X | ||||||
| Supralapsarianism | X | ||||||
| Surrealism | X | ||||||
| Sutra | X | ||||||
| Svabhava | X | ||||||
| Svaraj | X | ||||||
| Svatantra | X | ||||||
| Svetambara | X | ||||||
| Swedenborgianism | X | ||||||
| Syadvada | X | ||||||
| Syllogism | X | X | |||||
| Syllogism, medieval theories of | X | ||||||
| Symbol | X | ||||||
| symbolic logic | X | ||||||
| symbolicism | X | ||||||
| Symbolism | X | ||||||
| symbols, logical | X | ||||||
| Symmetry | X | ||||||
| Sympathy | X | ||||||
| sympathy | |||||||
| Symposium | X | ||||||
| Synaesthesia | X | ||||||
| Syncategorematic | X | X | |||||
| Syncretism | X | X | X | ||||
| Synderesis | X | X | X | ||||
| Syndicalism | X | ||||||
| Synechism | X | ||||||
| Synechology | X | ||||||
| Synergisrn | X | ||||||
| Synkatathesis | X | ||||||
| synonymous | X | ||||||
| Syntactics | X | X | |||||
| Syntagma | X | ||||||
| Syntax language | X | ||||||
| Syntax, logical | X | ||||||
| synthesis | |||||||
| Synthesis | X | X | |||||
| synthetic | X | ||||||
| Synthetic Judgment | X | ||||||
| systematicity | X | ||||||