Theaetetus 151e–186e: Did Plato Refute Protagoras?

In the Theaetetus, which seeks a definition of knowledge, the first definition of Theaetetus, namely that ‘knowledge is perception’, is easily refuted without the need to refer to Protagoras. But for Plato the refutation of Protagoras is a goal in itself, and he devotes almost half the dialogue to...

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Main Author: Guido Calenda
Format: Article
Language:deu
Published: Adam Mickiewicz University, Poznan 2024-12-01
Series:Peitho
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Online Access:https://pressto.amu.edu.pl/index.php/peitho/article/view/45304
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author Guido Calenda
author_facet Guido Calenda
author_sort Guido Calenda
collection DOAJ
description In the Theaetetus, which seeks a definition of knowledge, the first definition of Theaetetus, namely that ‘knowledge is perception’, is easily refuted without the need to refer to Protagoras. But for Plato the refutation of Protagoras is a goal in itself, and he devotes almost half the dialogue to this task. He argues that the doctrine of homo mensura amounts to saying that ‘all judgements are true’ and, using his ‘most exquisite argument’, he claims to prove that it is self-refuting. As many scholars have recognised, this alleged demonstration depends on the arbitrary dropping of the relativistic qualifier that specifies ‘for whom’ a given judgement is true. Plato does not justify the disappearance of the qualifier, but rather tries to disguise it. Indeed, Protagoras has an epistemological conception that is opposed to Plato’s theory of knowledge and that is fundamental to the logical justification of the political conceptions set out in the Republic. For Plato, therefore, the refutation of Protagoras’ doctrine of homo mensura is an imperative ethical requirement. He is not too demanding in his choice of arguments: he does not seek rigour in argumentation, only persuasive effectiveness – more than two millennia of interpretations have proved him right.
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spelling doaj-art-050ba8d92bdd49069a54c6550e464c082024-12-13T08:29:32ZdeuAdam Mickiewicz University, PoznanPeitho2082-75392024-12-0115110.14746/pea.2024.1.12Theaetetus 151e–186e: Did Plato Refute Protagoras?Guido Calenda0Roma Tre University In the Theaetetus, which seeks a definition of knowledge, the first definition of Theaetetus, namely that ‘knowledge is perception’, is easily refuted without the need to refer to Protagoras. But for Plato the refutation of Protagoras is a goal in itself, and he devotes almost half the dialogue to this task. He argues that the doctrine of homo mensura amounts to saying that ‘all judgements are true’ and, using his ‘most exquisite argument’, he claims to prove that it is self-refuting. As many scholars have recognised, this alleged demonstration depends on the arbitrary dropping of the relativistic qualifier that specifies ‘for whom’ a given judgement is true. Plato does not justify the disappearance of the qualifier, but rather tries to disguise it. Indeed, Protagoras has an epistemological conception that is opposed to Plato’s theory of knowledge and that is fundamental to the logical justification of the political conceptions set out in the Republic. For Plato, therefore, the refutation of Protagoras’ doctrine of homo mensura is an imperative ethical requirement. He is not too demanding in his choice of arguments: he does not seek rigour in argumentation, only persuasive effectiveness – more than two millennia of interpretations have proved him right. https://pressto.amu.edu.pl/index.php/peitho/article/view/45304ProtagorasPlatoTheaetetusepistemologypolitics
spellingShingle Guido Calenda
Theaetetus 151e–186e: Did Plato Refute Protagoras?
Peitho
Protagoras
Plato
Theaetetus
epistemology
politics
title Theaetetus 151e–186e: Did Plato Refute Protagoras?
title_full Theaetetus 151e–186e: Did Plato Refute Protagoras?
title_fullStr Theaetetus 151e–186e: Did Plato Refute Protagoras?
title_full_unstemmed Theaetetus 151e–186e: Did Plato Refute Protagoras?
title_short Theaetetus 151e–186e: Did Plato Refute Protagoras?
title_sort theaetetus 151e 186e did plato refute protagoras
topic Protagoras
Plato
Theaetetus
epistemology
politics
url https://pressto.amu.edu.pl/index.php/peitho/article/view/45304
work_keys_str_mv AT guidocalenda theaetetus151e186edidplatorefuteprotagoras