Renata Ziemińska

Two concepts of the internal should be distinguished in the current epistemic internalism/externalism debate: (1) the internal in an introspective sense as what is accessible by introspection and (2) the internal in a biological sense as what is inside the organism's nervous system. When "internal" is meant in the introspective sense, Goldman's process reliabilism is externalist, but when "internal" is taken in the biological sense, Goldman's process reliabilism is internalist. Goldman as a naturalist prefers "internal" in the biological sense, but the concept is unsuitable for presenting the current epistemic internalism/externalism controversy. If one understands "internal" in the introspective sense, Goldman's reliabilism is strongly externalist.

Luca Castagnoli, Ancient Self-Refutation. The Logic and History of the Self- Refutation Argument from Democritus to Augustine, Cambridge: Cambridge University Press 2010, pp. XX+394. Hardback, ISBN 9780521896313. Abstract. In his book Ancient Self-Refutation L. Castagnoli rightly observes that selfrefutation is not falsification; it overturns the act of assertion but does not prove that the content of the act is false. He argues against the widely spread belief that Sextus Empiricus accepted the self-refutation of his own expressions. Castagnoli also claims that Sextus was effective in answering to the self-refutation charge. The achievement of the book is the disperitropécovery that in passages where Sextus seems to embrace the selfrefutation of his expressions (PH 1.14-15), he does not use the term peritropé, technical for self-refutation, but the term perigraphé, which means self-bracketing. Selfbracketing is weakening one’s own thesis, but not overturning it. Castagnoli claims that Sextus embraces the self-bracketing of his expressions, but never accepts their selfrefutation. However, Castagnoli is not right in saying that self-refutation is a shameful mistake for everybody. The mature skeptic cannot even think that self-refutation is wrong, because it would be a dogmatic view. Sextus seems to accept self-refutation at the end of Against the Logicians, where he presents the argument against proof and the metaphor of the ladder (M 8.480-1). Regardless of Sextus’ declarations, we have reason to think that he does not avoid self-refutation in a pragmatic sense. Self-bracketing of his position is not a consistent dialectical strategy, as Castagnoli writes, but the end of a rational discussion. Sextus avoids absolute self-refutation (we cannot falsify what he suggests), but he is unable to avoid pragmatic self-refutation (there is no way to assert his position without contradiction). This is the case even if Sextus refuses to assert his position.

Skepticism described by Sextus Empiricus faces the persistent charge that it is an inconsistent, self-refuting view. However, recently its consistency hasbeen defended in three important ways: it is a thesis with weak assertion, it is a practice without any assertion, and it is a process developing over time.The first option is not well supported by Sextus’ texts, where even a weak assertion is not allowed. The second option cannot explain the rationality of skeptical arguments. The third option reveals two levels of Sextan skepticism; however, the developing skeptic has to accept the self-refutation charge, and the mature skeptic takes flight from the charge without any rational answer. I claim that Sextus embraces the self-refutation charge. The mature skeptic’s speech acts are pragmatically inconsistent: their content cannot be asserted without contradiction. As a result, the charge of inconsistency is not answered

Epistemic externalists offer many arguments against skepticism. They modify the skeptic’s concept of knowledge, justification and meaning and point out which of his presuppositions we need not accept. Dretske claims that a skeptic wrongly presupposes that we cannot know if we do not know that we know. But knowledge need not be self-conscious . According to Nozick a skeptic wrongly presupposes the Principle of Closure . He says that although we do not know that we are not brains in a vat, a skeptic does not have the right to use this principle to argue that we do not know things that are obvious. According to Putnam the skeptical hypothesis that we are brains in a vat is incoherent when we use the external theory of meaning. If the meaning of our words depends on a causal relation with our environment, the sentence “I am a brain in a vat” is false or meaningless. Similarly, Davidson says that the external theory of perceptual beliefs excludes global skepticism. According to Williams skepticism simply presupposes a stance opposite to externalism, namely internalism . When we reject internalism, no skeptical argument can be formulated

Luca Castagnoli, Ancient Self-Refutation. The Logic and History of the Self- Refutation Argument from Democritus to Augustine, Cambridge: Cambridge University Press 2010, pp. XX+394. Hardback, ISBN 9780521896313. In his book Ancient Self-Refutation L. Castagnoli rightly observes that selfrefutation is not falsification; it overturns the act of assertion but does not prove that the content of the act is false. He argues against the widely spread belief that Sextus Empiricus accepted the self-refutation of his own expressions. Castagnoli also claims that Sextus was effective in answering to the self-refutation charge. The achievement of the book is the discovery that in passages where Sextus seems to embrace the selfrefutation of his expressions (PH 1.14-15), he does not use the term peritropé, technical for self-refutation, but the term perigraphé, which means self-bracketing. Selfbracketing is weakening one’s own thesis, but not overturning it. Castagnoli claims that Sextus embraces the self-bracketing of his expressions, but never accepts their selfrefutation. However, Castagnoli is not right in saying that self-refutation is a shameful mistake for everybody. The mature skeptic cannot even think that self-refutation is wrong, because it would be a dogmatic view. Sextus seems to accept self-refutation at the end of Against the Logicians, where he presents the argument against proof and the metaphor of the ladder (M 8.480-1). Regardless of Sextus’ declarations, we have reason to think that he does not avoid self-refutation in a pragmatic sense. Self-bracketing of his position is not a consistent dialectical strategy, as Castagnoli writes, but the end of a rational discussion. Sextus avoids absolute self-refutation (we cannot falsify what he suggests), but he is unable to avoid pragmatic self-refutation (there is no way to assert his position without contradiction). This is the case even if Sextus refuses to assert his position.

The paper presents four stages of author’s epistemological experience: Roman Ingarden’s autonomous theory of knowledge, the anti-naturalistic theory of knowledge by Roderick Chisholm, the naturalistic epistemology by Alvin Goldman, and the epistemology of classical problems of truth and skepticism. The conclusion is the following: epistemology should make use of human knowledge results, especially cognitive sciences and reflect on the problem of truth, the challenge of skepticism, the possibility of knowledge and human cognitive condition (science, religion, art). The social role of the epistemologist is not to resolve all these existentially important questions but to be an expert (to know the state of discussion and to deliver his/her opinions)

Academic skepticism is usually interpreted as a type of discourse without an assertion (a dialectical interpretation). I argue against this interpretation. One can interpret Carneades’ notion of approval as our notion of weak assertion and thereby ascribe to him his own views (a non-dialectical interpretation). In Academica Cicero reports the debate about the status of approval as a kind of assent among Carneades’ followers, especially the views of Clitomachus and Philo of Larissa. According to Clitomachus, approving impressions implies acting on them without taking them as true, while according to Philo of Larissa, approval is taking something as true without certainty. In more modern terms, we can say that Philo refers to the notion of weak assertion, and Clitomachus to non-assertion. Thus Clitomachus’ reading correlates with a dialectical reading, and Philo’s reading correlates with a non-dialectical reading. Philo’s reading leads to the interpretation of Carneades as a quasi-fallibilist. It is difficult to establish the precise position of the historical Carneades because he was hesitant in his oral teaching. Still, there is some basis in Carneades’ theory for interpreting approval as weak assertion (comprising three degrees of persuasiveness involving rational consideration of what seems to be truth). My aim in this essay is thus to argue that a quasi-fallibilist and non-dialectical reading is applicable to the historical Carneades.