The problem of induction is formulated as a set of three questions, namely: ‘What is the nature of the attitude of acceptance that we adopt in relation to certain theories?’ ‘What are the rules according to which we select those theories which we accept?’ and, ‘What is the justification for the adoption of those rules?’. An original answer is proposed for each question in turn, with the help of the new concepts of sub-theory, established sub-theory, aberrant, arbitrary and degenerate theories. (...) The answer to the third question follows the lines of Reichenbach's pragmatic strategy. (shrink)

This paper consists in an attempt to refute Quine's principle of the indeterminacy of radical translation. The structure of the argument is as follows. The demonstration of the principle in Quine's work rests on certain conception of the process of radical translation. This conception can be maintained only if certain presuppositions are made concerning the nature of language and its speakers. However, if those presuppositions are adopted, there is no reason for not accepting also other presuppositions, which would invalidate Quine's (...) demonstration.O trabalho consiste em uma tentativa de refutação do princípio quineano da indeterminação da tradução radical. A estrutura do argumento é a seguinte. A demonstração do princípio no texto de Quine assenta-se sobre certa concepção do processo de tradução radical. Esta concepção só se sustenta se são adotadas certas pressuposições a respeito da natureza da linguagem e dos falantes. Entretanto, se estas pressuposições são adotadas, não há razão para não se aceitarem também outras pressuposições - as quais invalidam a demonstração de Quine. (shrink)