L
- La Sabliere, Marguerite Hessein de
- La Vallière, Louise-Françoise de la Baume Le Blanc, marquise de
- Lacan, Jacques
- Lambert, Anne-Thérèse Marguenat de Courcelles, marquise de
- Lambda Calculi
- Language and Frege
- Language in Classical Chinese Philosophy
- Language of Thought Hypothesis
- Language, Knowledge of
- Language, Philosophy of
- Language, Religious
- Lao Sze-kwang
- Laozi (Lao-tzu)
- Latin American Philosophy
- Law and Economics
- Law, Philosophy of
- Laws of Nature
- Legal Hermeneutics
- Legal Positivism
- Legal Pragmatism
- Legal Validity
- Leibniz, Gottried Wilhelm
- Lenclos, Ninon de
- Lequyer (Lequier), Jules
- Leucippus
- Lewis, Clarence Irving
- Lewis, David Kellogg
- Liar Paradox
- Libertarianism
- Liezi (Lieh-tzu)
- Lindenbaum, Adolf
- Lipsius, Justus
- Literary Theory
- Locke, John
- Logic
- Lokāyata/Cārvāka – Indian Materialism
- Lombard, Peter
- Lonergan, Bernard
- Lotze, Rudolph Hermann
- Love, History of
- Love, Philosophy of
- Lowe, Edward Jonathan
- Lucas-Penrose Argument about Gödel’s Theorem
- Luck
- Lucretius
- Luther, Martin
- Lyotard, Jean-Francois
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