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Abelard, Peter
Abrabanel, Judah
Abravanel, Isaac
Adamson, Robert
Adelard of Bath
Adorno, Theodor W.
Aenesidemus
Agamben, Giorgio
Agrippa, Heinrich Cornelius
Ajdukiewicz, Kazimierz
Albert of Saxony
Albertus Magnus
Alcmaeon of Croton
Alcott, Amos Bronson
Alembert, Jean le Rond d'
Alexander of Aphrodisias
Alexander of Hales
Alexander Polyhistor
Alexander, Samuel
al-Farabi, Abu Nasr
al-Ghazali, Abu Hamid
Alighieri, Dante
al-Kindi, Yaqub ibn Ishaq
al-Razi, Abu Bakr
Alston, William P.
Althusser, Louis
Ambrose of Milan, St.
Ammonius Saccas
Anaxagoras
Anaxarchus
Anaximander
Anaximenes
Andronicus of Rhodes
Anscombe, G. E. M.
Anselm of Canterbury, St.
Antiphon
Antisthenes
Apel, Karl-Otto
Apuleius of Madaura
Aquinas, St. Thomas
Arcesilaus
Archelaus
Archytas of Tarentum
Arendt, Hannah
Aristippus of Cyrene
Aristotle
Armstrong, David M.
Arnauld, Antoine
Astell, Mary
Augustine of Hippo, St.
Auriol, Peter
Austin, John
Austin, John Langshaw
Averroes
Avicenna
Ayer, Alfred Jules

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