Aristotle: Truth

In this first part of a 2-part survey of Aristotle's epistemology, I present an overview of the features Aristotle attributes to gnōsis (cognition or knowledge), a term Aristotle applies to true cognitive states, whether rational or non-rational. Gnōsis is being in contact with reality. How this is done differs depending on the domain but for Aristotle all the cases involve taking on the form of the object known, which is what makes it factive. I present perception and experience (empeiria) and (...) the role they play in acquiring knowledge. I then cover Aristotle's understanding of belief (hupolēpsis) and opinion (doxa) and lay out why he thinks they are rational activities, but not excellences. I then provide an overview of current scholarly views on nous (comprehension or understanding) and epistēmē (scientific knowledge). (shrink)

In this second part of a 2-part survey of Aristotle's epistemology, I present an overview of Aristotle's views on technē (craft or excellent productive reason) and phronēsis (practical wisdom or excellent practical reason). For Aristotle, attaining the truth in practical matters involves actually doing the right action. While technē and phronēsis are rational excellences, for Aristotle they are not as excellent or true as epistēmē or nous because the kinds of truth that they grasp are imperfect and because they are (...) excellent states for humans, not simply speaking. I then discuss why Aristotle takes sophia (wisdom), understanding and scientific knowledge of the best things, to be its own excellence. While this is the best cognitive state for human beings, I argue that Aristotle thinks divine cognitive activity is different in kind and more perfect than any human activity. (shrink)

Some of Aristotle’s statements about the indemonstrability of the Principle of Non-Contradiction (PNC) in Metaphysics Γ 4 merit more attention. The consensus seems to be that Aristotle provides two arguments against the demonstrability of the PNC, with one located in Γ 3 and the other found in the first paragraph of Γ 4. In this article, I argue that Aristotle also relies upon a third argument for the same conclusion: the argument from truth. Although Aristotle does not explicitly state this (...) argument, it is the best argument that he could use to defend some of his statements in the second paragraph of Γ 4. Since the argument relies on only a few of Aristotle’s core views about truth, I propose that it is faithful to his considered position throughout his corpus, and it may be the strongest argument he could offer for the indemonstrability of the PNC. (shrink)

: The purpose of this paper is to discuss the concept of truth formulated by Franz Brentano in 1889. As a textual basis, I take Brentano's communication, presented to the philosophical community of Vienna in March 1889, entitled "On the concept of truth", and I provide a systematic exposition of Brentano's analysis of the problems surrounding the interpretation of the Aristotelian concept of truth as correspondence. My analysis explains how Brentano reinter-preted the Aristotelian concept of truth as correspondence within the (...) conceptual framework of his descriptive psychology.Resumo: O objetivo deste artigo é apresentar a análise, o problema, a solução, mas, em particular, o conceito de verdade formulado por Franz Brentano, em 1889. Como base textual, eu analiso a comunicação de Brentano apresentada à comunidade filosófica de Viena, em março de 1889, intitulada Sobre o conceito de verdade, e faço uma exposição sistemática da análise de Brentano acerca dos problemas que envolvem a interpretação do conceito aristotélico de verdade como correspondência. Minha interpretação explicita o modo como Brentano reinterpretou o conceito aristotélico de verdade como correspondência, no contexto da estrutura conceitual de sua psicologia descritiva. (shrink)

Aristotle’s philosophy is considered with respect to one central concept of his philosophy, viz. opposition. Far from being a mere side-effect of syllogistic, it is argued in the present paper that opposition helps to articulate ontology and logic through an account of what can be or cannot be in a systematic and structural way. The paper is divided into three main parts. In Section I, the notion of Being is scrutinized through Aristotle’s theory of categories. In Section II, the notion (...) of Non-Being is connected to Aristotle’s theory of oppositions. In Section III, the notion of essence is revisited in order to bring about a holist theory of meaning by individuating through opposite properties. In conclusion, the legacy of Aristotle is depicted as balanced between a powerful reflection around Being and a restrictive ontology of substance. (shrink)

O presente artigo se propõe definir o que é predicação em Aristóteles, como predicamos e qual o critério para determinar se uma predicação é verdadeira ou falsa. Nossas referências serão o livro Das Categorias, do capítulo 1 ao 5 e Da interpretação do capítulo 1 ao 6. Concluiremos que a teoria da predicação em Aristóteles afirma que definir algo é predicar e que o critério de verdade de uma proposição é a sua correspondência aos fatos.

A philosophical history of the Aristotelian notion of truth, in consideration of later developments of comparative logic and dialectic.

This paper discusses the contrast between scientific knowledge and opinion as it is presented by Aristotle in Posterior Analytics A.33. Aristotle's contrast is formulated in terms of understanding or not understanding some "necessary items". I claim that the contrast can only be understood in terms of explanatory relevance. The "necessary items" are middle terms (or explanatory factors) that are necessary for the fully appropriate explanation. This approach gives a coherent interpretation of each step in the chapter.

Aristotle famously proclaims at Metaphysics Г.7, 1011b26–27: To men gar legein to on mê einai ê to mê on einai pseudos, to de to on einai kai to mê on mê einai alêthes, . . . Aristotle is inclined to think of this as a definition of truth and falsehood;1 we are inclined to wonder what he means by it. Perhaps a reasonable approximation in English would amount to something like: Tdf: For to state [of] that which is [that] it (...) is not or [of] that which is not [that] it is [is] false, and [to state of] that which is [that] it is and [of] that which is not [that] it is not [is] true. Many have considered this to be the expression of a correspondence theory of truth, and so it is tempting to .. (shrink)

This paper shows that Aristotle's De Interpretatione does not separate syntax from semantics. Linguistic sentences are not syntactic entities, and non-linguistic meanings are not semantic propositions expressed by linguistic sentences. In fact, Aristotle resorts to a mental conception of meaning, distinguishing linguistic meanings in a given language from non-linguistic mental contents in relation to actual things: while the former are not the same for all, the latter are shared by everyone. Aristotle is not a modern logician, like Boole, Frege, or (...) Russell, in so far as a mental conception of meaning does not reveal an abstract semantics for a syntactic language. (shrink)

A tese central deste trabalho consiste em reconstruir em bases filosóficas as linhas gerais da teoria aristotélica da verdade mostrando, a partir da análise do Livro IV da Metafísica, que esta teoria está fundada naquilo que é chamado nesta investigação de princípio transcendental de verdade, o qual é constituído pela bi- implicação modal dos princípios de não-contradição, do terceiro excluído e de identidade.