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Sextus Empiricus
Born	Second century CE
Died	Late 2nd century or early 3rd century possibly in Alexandria or Rome
Philosophical work
Era	Hellenistic philosophy
Region	Western philosophy
School	Pyrrhonism Empiric school
Main interests	Skepticism
Notable works	Outlines of Pyrrhonism Against the Dogmatists Against the Professors

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Sextus Empiricus (Ancient Greek: Σ?ξτο? ?μπειρικ??, Sextos Empeirikos; fl.?mid-late 2nd century CE) was a Greek Pyrrhonist philosopher and Empiric school physician with Roman citizenship. His philosophical works are the most complete surviving account of ancient Greek and Roman Pyrrhonism, and because of the arguments they contain against the other Hellenistic philosophies, they are also a major source of information about those philosophies.

Life

Little is known about Sextus Empiricus. He likely lived in Alexandria, Rome, or Athens. His Roman name, Sextus, implies he was a Roman citizen. The Suda, a 10th-century Byzantine encyclopedia, states that he was the same person as Sextus of Chaeronea, as do other pre-modern sources, but this identification is commonly doubted. In his medical work, as reflected by his name, tradition maintains that he belonged to the Empiric school in which Pyrrhonism was popular. However, at least twice in his writings, Sextus seems to place himself closer to the Methodic school.

Philosophy

Main article: Pyrrhonism

As a skeptic, Sextus Empiricus raised concerns which applied to all types of knowledge. He doubted the validity of induction long before its best known critic, David Hume, and raised the regress argument against all forms of reasoning:

Those who claim for themselves to judge the truth are bound to possess a criterion of truth. This criterion, then, either is without a judge's approval or has been approved. But if it is without approval, whence comes it that it is trustworthy? For no matter of dispute is to be trusted without judging. And, if it has been approved, that which approves it, in turn, either has been approved or has not been approved, and so on ad infinitum.

This view is known as Pyrrhonian skepticism, which Sextus differentiated from Academic skepticism as practiced by Carneades which, according to Sextus, denies the possibility of knowledge altogether, something that Sextus criticized as being an affirmative belief. Instead, Sextus advocates simply giving up belief; in other words, suspending judgment (epoché) about whether or not anything is knowable. Only by suspending judgment can we attain a state of ataraxia (roughly, 'peace of mind').

There is some debate as to the extent to which Sextus advocated the suspension of judgement. According to Myles Burnyeat, Jonathan Barnes, and Benson Mates, Sextus advises that we should suspend judgment about virtually all beliefs; that is to say, we should neither affirm any belief as true nor deny any belief as false, since we may live without any beliefs, acting by habit. Michael Frede, however, defends a different interpretation, according to Sextus, beliefs are permissible so long as they are not grounded in reason, philosophy, or speculation; a skeptic may, for instance, accept commonly held views within their society. The key distinction between the skeptic and the dogmatist lies in the source of belief: the skeptic does not arrive at beliefs through rigorous philosophical inquiry.

Writings

Diogenes La?rtius and the Suda report that Sextus Empiricus wrote ten books on Pyrrhonism. The Suda also says Sextus wrote a book Ethica. Sextus Empiricus's three surviving works are the Outlines of Pyrrhonism (Πυ???νειοι ?ποτυπ?σει?, Pyrrhōneioi hypotypōseis, thus commonly abbreviated PH), and two distinct works preserved under the same title, Adversus Mathematicos (Πρ?? μαθηματικο??, Pros mathematikous, commonly abbreviated "AM" or "M" and known as Against Those in the Disciplines, or Against the Mathematicians). Adversus Mathematicos is incomplete as the text references parts that are not in the surviving text. Adversus Mathematicos also includes mentions of three other works which did not survive:

• Medical Commentaries (AD I 202)
• Empirical Commentaries (AM I 62)
• Commentaries on the Soul which includes a discussion of the Pythagoreans' metaphysical theory of numbers (AD IV 284) and shows that the soul is nothing (AM VI 55)

The surviving first six books of Adversus Mathematicos are commonly known as Against the Professors. Each book also has a traditional title; although none of these titles except Pros mathematikous and Pyrrhōneioi hypotypōseis are found in the manuscripts.

Book	English title	Greek title
I	Against the Grammarians	Πρ?? γραμματικο?? / Pros grammatikous
II	Against the Rhetoricians	Πρ?? ?ητορικο?? / Pros rhetorikous
III	Against the Geometers	Πρ?? γεωμετρικο?? / Pros geometrikous
IV	Against the Arithmeticians	Πρ?? ?ριθμητικο?? / Pros arithmetikous
V	Against the Astrologers	Πρ?? ?στρολ?γου? / Pros astrologous
VI	Against the Musicians	Πρ?? μουσικο?? / Pros mousikous

Adversus Mathematicos I–VI is sometimes distinguished from Adversus Mathematicos VII–XI by using another title, Against the Dogmatists (Πρ?? δογματικο??, Pros dogmatikous) and then the remaining books are numbered as I–II, III–IV, and V, despite the fact that it is commonly inferred that what we have is just part of a larger work whose beginning is missing and it is unknown how much of the total work has been lost. The supposed general title of this partially lost work is Skeptical Treatises' (Σκεπτικ? ?πομν?ματα/Skeptika Hypomnēmata).

Book	English title	Greek title
VII–VIII	Against the Logicians	Πρ?? λογικο?? / Pros logikous
IX–X	Against the Physicists	Πρ?? φυσικο?? / Pros Physikous
XI	Against the Ethicists	Πρ?? ?θικο?? / Pros Ethikous

Legacy

An influential Latin translation of Sextus's Outlines was published by Henricus Stephanus in Geneva in 1562, and this was followed by a complete Latin Sextus with Gentian Hervet as translator in 1569. Petrus and Jacobus Chouet published the Greek text for the first time in 1621. Stephanus did not publish it with his Latin translation either in 1562 or in 1569, nor was it published in the reprint of the latter in 1619.

Sextus's Outlines were widely read in Europe during the 16th, 17th and 18th centuries, and had a profound effect on Michel de Montaigne, David Hume and Georg Wilhelm Friedrich Hegel, among many others. Another source for the circulation of Sextus's ideas was Pierre Bayle's Dictionary. Since the Renaissance, French philosophy has been continuously influenced by Sextus: Montaigne in the 16th century, Descartes, Blaise Pascal, Pierre-Daniel Huet and Fran?ois de La Mothe Le Vayer in the 17th century, many of the "Philosophes", and in recent times controversial figures such as Michel Onfray, in a direct line of filiation between Sextus' radical skepticism and secular or even radical atheism.

Works

Translations

Old complete translation in four volumes

• Sextus Empiricus, Sextus Empiricus I: Outlines of Pyrrhonism. R.G. Bury (trans.) (Cambridge, Massachusetts: Harvard University Press, 1933/2000). ISBN 0-674-99301-2
• Sextus Empiricus, Sextus Empiricus II: Against the Logicians. R.G. Bury (trans.) (Cambridge, Massachusetts: Harvard University Press, 1935/1997). ISBN 0-674-99321-7
• Sextus Empiricus, Sextus Empiricus III: Against the Physicists, Against the Ethicists. R.G. Bury (trans.) Cambridge, Massachusetts: Harvard University Press, 1936/1997. ISBN 0-674-99344-6
• Sextus Empiricus, Sextus Empiricus IV: Against the Professors. R.G. Bury (trans.) (Cambridge, Massachusetts: Harvard University Press, 1949/2000). ISBN 0-674-99420-5

New partial translations

• Sextus Empiricus, Against the Grammarians (Adversos Mathematicos I) David Blank (trans.) Oxford: Clarendon Press, 1998. ISBN 0-19-824470-3
• Sextus Empiricus, Against the Mathematicians (Adversos Mathematicos IV) Lorenzo Corti (trans.) Leiden: Brill, 2024. ISBN 978-90-04-67949-8
• Sextus Empiricus, Against those in the Disciplines (Adversos Mathematicos I-VI). Richard Bett (trans.) (New York: Oxford University Press 2018). ISBN 9780198712701
• Sextus Empiricus, Against the Logicians. (Adversus Mathematicos VII and VIII). Richard Bett (trans.) Cambridge: Cambridge University Press, 2005. ISBN 0-521-53195-0
• Sextus Empiricus, Against the Physicists (Adversus Mathematicos IX and X). Richard Bett (trans.) Cambridge: Cambridge University Press, 2012. ISBN 0-521-51391-X
• Sextus Empiricus, Against the Ethicists (Adversus Mathematicos XI). Richard Bett (trans.) (Oxford: Clarendon Press, 2000). ISBN 0-19-825097-5
• Sextus Empiricus, Outlines of Scepticism. Julia Annas and Jonathan Barnes (trans.) (Cambridge: Cambridge University Press, 2nd ed. 2000). ISBN 0-521-77809-3
• Sextus Empiricus, The Skeptic Way: Sextus Empiricus's Outlines of Pyrrhonism. Benson Mates (trans.) Oxford: Oxford University Press, 1996. ISBN 0-19-509213-9
• Sextus Empiricus, Selections from the Major Writings on Skepticism Man and God. Sanford G. Etheridge (trans.) Indianapolis: Hackett, 1985. ISBN 0-87220-006-X

French translations

• Sextus Empiricus, Contre les Professeurs (the first six treatises), Greek text and French Translation, under the editorship of Pierre Pellegrin (Paris: Seuil-Points, 2002). ISBN 2-02-048521-4
• Sextus Empiricus, Esquisses Pyrrhoniennes, Greek text and French Translation, under the editorship of Pierre Pellegrin (Paris: Seuil-Points, 1997).

Old editions

• Sexti Empirici Adversus mathematicos, hoc est, adversus eos qui profitentur disciplinas, Gentiano Herveto Aurelio interprete, Parisiis, M. Javenem, 1569 (Vicifons).

See also

• Philosophical skepticism
• Protagoras
• Dissoi Logoi

Bibliography

• Annas, Julia and Barnes, Jonathan, The Modes of Scepticism: Ancient Texts and Modern Interpretations, Cambridge: Cambridge University Press, 1985. ISBN 0-521-27644-6
• Bailey, Alan, Sextus Empiricus and Pyrrhonean scepticism, Oxford: Oxford University Press, 2002. ISBN 0-19-823852-5
• Berry, Jessica (2011). Nietzsche and the Ancient Skeptical Tradition. Oxford University Press. p. 230. ISBN 978-0-19-536842-0.
• Bett, Richard, Pyrrho, His Antecedents, and His Legacy, Oxford: Oxford University Press, 2000. ISBN 0-19-925661-6
• Breker, Christian, Einführender Kommentar zu Sextus Empiricus' "Grundriss der pyrrhonischen Skepsis", Mainz, 2011: electr. publication, University of Mainz. available online (comment on Sextus Empiricus' "Outlines of Pyrrhonism" in German language)
• Brennan, Tad, Ethics and Epistemology in Sextus Empiricus, London: Garland, 1999. ISBN 0-8153-3659-4
• Brochard, Victor, Les Sceptiques grecs (1887) reprint Paris: Librairie générale fran?aise, 2002.
• Burnyeat, Myles and Frede, Michael The Original Sceptics: A Controversy, Hackett: Indianapolis, 1997. ISBN 0-87220-347-6
• Floridi, Luciano, Sextus Empiricus: the Transmission and Recovery of Pyrrhonism, Oxford: Oxford University Press, 2002. ISBN 0-19-514671-9
• Hankinson, R.J., The Sceptics, London: Routledge, 1998. ISBN 0-415-18446-0
• Hookway, C., Scepticism, London: Routledge, 1992. ISBN 0-415-08764-3
• Jourdain, Charles, Sextus Empiricus et la philosophie scholastique, Paris: Paul Dupont, 1858.
• Janá?ek, Karel, Sexti Empirici indices, Firenze: Olschki, 2000.
• Janá?ek, Karel, Studien zu Sextus Empiricus, Diogenes Laertius und zur pyrrhonischen Skepsis. Hrsg. v. Jan Janda / Filip Karfík (= Beitr?ge zur Altertumskunde; Bd. 249), Berlin: de Gruyter 2008.
• Mates, Benson, The Skeptic Way: Sextus Empiricus's Outlines of Pyrrhonism, Oxford: Oxford University Press, 1996.
• Pappenheim Eugen, Lebensverh?ltnisse des Sextus Empiricus, Berlin, Nauck, 1875.
• Perin, Casey, The Demands of Reason: An Essay on Pyrrhonian Scepticism, Oxford: Oxford University Press, 2010.
• Popkin, Richard, The History of Scepticism: From Savonarola to Bayle, Oxford: Oxford University Press, 2003. ISBN 0-19-510768-3
• Vazquez, Daniel, Reason in Check: the Skepticism of Sextus Empiricus, Hermathena, 186, 2009, pp. 43–57.

External links

• Works by or about Sextus Empiricus at Wikisource
• Excerpts from the "Outlines of Pyrrhonism" by Sextus Empiricus
• Morison, Benjamin. "Sextus Empiricus". In Zalta, Edward N. (ed.). Stanford Encyclopedia of Philosophy.
• Sextus Empiricus and Greek Scepticism (at Project Gutenberg; includes translation of first book of the Pyrrhonic Sketches)
• The complete works of Sextus Empiricus in Greek (at Google Books).
• Sexti Empirici opera recensuit Hermannus Mutschmann, voll. 2, Lipsiae in aedibus B. G. Teubneri, 1912.