We present a theoretical view of the cellular foundations for network-level processes involved in producing our conscious experience. Inputs to apical synapses in layer 1 of a large subset of neocortical cells are summed at an integration zone near the top of their apical trunk. These inputs come from diverse sources and provide a context within which the transmission of information abstracted from sensory input to their basal and perisomatic synapses can be amplified when relevant. We argue that apical amplification (...) enables conscious perceptual experience and makes it more flexible, and thus more adaptive, by being sensitive to context. Apical amplification provides a possible mechanism for recurrent processing theory that avoids strong loops. It makes the broadcasting hypothesized by global neuronal workspace theories feasible while preserving the distinct contributions of the individual cells receiving the broadcast. It also provides mechanisms that contribute to the holistic aspects of integrated information theory. As apical amplification is highly dependent on cholinergic, aminergic, and other neuromodulators, it relates the specific contents of conscious experience to global mental states and to fluctuations in arousal when awake. We conclude that apical dendrites provide a cellular mechanism for the context-sensitive selective amplification that is a cardinal prerequisite of conscious perception. (shrink)

We argue that prediction success maximization is a basic objective of cognition and cortex, that it is compatible with but distinct from prediction error minimization, that neither objective requires subtractive coding, that there is clear neurobiological evidence for the amplification of predicted signals, and that we are unconvinced by evidence proposed in support of subtractive coding. We outline recent discoveries showing that pyramidal cells on which our cognitive capabilities depend usually transmit information about input to their basal dendrites and amplify (...) that transmission when input to their distal apical dendrites provides a context that agrees with the feedforward basal input in that both are depolarizing, i.e., both are excitatory rather than inhibitory. Though these intracellular discoveries require a level of technical expertise that is beyond the current abilities of most neuroscience labs, they are not controversial and acclaimed as groundbreaking. We note that this cellular cooperative context-sensitivity greatly enhances the cognitive capabilities of the mammalian neocortex, and that much remains to be discovered concerning its evolution, development, and pathology. (shrink)

A distinguished team of fourteen European philosophers addresses the current debates on internalism versus externalism in the philosophy of language and mind. The main objective of the volume is to demonstrate the philosophical significance and fruitfulness of the internalism/externalism debate on a wide range of issues, and to do so in a manner which is sophisticated yet accessible to non-specialists. The issues authors deal with include linguistic deference, interpreting classical externalist thought-experiments by Putnam and Burge, the nature of Wittgenstein's externalism, (...) apriority, intersubjective externalism, and object-dependence of thought and temporal externalism. Some of the contributors try to strike a balance between internalist and externalist position. (shrink)

Predictive Processing theory, hotly debated in neuroscience, psychology and philosophy, promises to explain a number of perceptual and cognitive phenomena in a simple and elegant manner. In some of its versions, the theory is ambitiously advertised as a new theory of conscious perception. The task of this paper is to assess whether this claim is realistic. We will be arguing that the Predictive Processing theory cannot explain the transition from unconscious to conscious perception in its proprietary terms. The explanations offer (...) by PP theorists mostly concern the preconditions of conscious perception, leaving the genuine material substrate of consciousness untouched. (shrink)

The present paper was written as a contribution to ongoing methodological debates within the NCC project. We focus on the neural correlates of conscious perceptual episodes. Our claim is that the NCC notion, as applied to conscious perceptual episodes, needs to be reconceptualized. It mixes together the processing related to the perceived contents and the neural substrate of consciousness proper, i.e. mechanisms making the perceptual contents conscious. We thus propose that the perceptual NCC be divided into two constitutive subnotions. The (...) main theoretical idea that emerges as a consequence of this reconceptualization is that the neural correlate of a perceptual episode is formed in the neural interaction between content-processing and consciousness-conferring mechanisms. The paper elaborates this distinction, marshals some initial arguments in its favour, and tests it against some of the most debated theories of consciousness. (shrink)

Studie recenzuje díla: Sam HARRIS, The Moral Landscape a Patricia Smith CHURCHLAND, Braintrust. Cílem recenzní stati je vyzdvihnout hlubokou shodu v naturalistickém pojetí etiky u obou autorů a upozornit na některé nedostatky jejich argumentace.

Two important questions arise concerning the properties that constitute the phenomenal characters of our experiences: first, where these properties exist, and, second, whether they are tied to our consciousness of them. Such properties can either exist externally to the perceiving subject, or internally to her. This article argues that phenomenal characters, and specifically the phenomenal characters of colours, may exist independently of consciousness and that they are internal to the subject. We defend this combination of claims against a recent criticism (...) according to which the unconscious phenomenal character of colours exists externally to the subject. We defend internalism about (potentially unconscious) phenomenal character by appealing to recent neuroscientific and behavioural evidence, and by rejecting the claim that externalism about phenomenal character is dialectically in a better position than internalism. In addition, we briefly present certain difficulties for externalist views of phenomenal character. These concern cases where the perceptual relation fails, but a perceptual experience still results. These points suffice to defuse the externalist critique of our view, and support the internalist variant of the consciousness-independence claim as the most plausible account of the unconscious phenomenal character of colours. (shrink)

This volume contains papers based on invited lectures from the 16th International Congress of Logic, Methodology and Philosophy of Science and Technology, descriptions of congress symposia, and other materials relating to the congress and DLMPST.

Elective abortion has become an issue of ethical and political debate in many countries including Mexico. As gynecologists are directly involved in the practice of abortion, it is important to know the psychological meaning that the term ‘elective abortion’ has for them. This study explores the psychological meaning and attitudes toward elective abortion of one hundred and twenty-three Mexican gynecologists. We used the semantic networks technique, which analyzed the words the participants associated with the term ‘elective abortion’. The defining words (...) most frequently used by participants implied a negative sanction. There were important differences by gender and religiosity: male gynecologists, as well as those with strong religious beliefs (mainly Catholics), revealed a more negative psychological meaning and more negative attitudes than females or physicians with weak religious beliefs. A contribution of the present study is that it highlights the importance of psychology to enhancing understanding of the issue of elective abortion. (shrink)

Tato kritická studie se zabývá dvěma současnými knihami o epistemickém relativismu, Boghossianovou Fear of Knowledge a Halesovou Relativism and the Foundations of Philosophy. První z těchto prací se přesvědčivě pokouší vyvrátit populární relativistické a konstruktivistické teze, zatímco ta druhá předkládá obhajobu specifické formy relativismu zaměřené na filosofické propozice.

Text se formou polemiky zabývá otázkou, zda je možné rozřešit filozofický spor mezi realismem a konstruktivismem. Oproti mínění Jaroslava Peregrina hájí autor tezi, že tento spor rozřešit lze, a to ve prospěch realismu. Argumenty pro realismus jsou výrazně přesvědčivější, zatímco konstruktivistické argumenty nejsou ničím podložené a zároveň vedou k absurdním důsledkům. The text adresses, in a polemical fashion, the question whether the philosophical dispute between realism and constructivism can be resolved. Against the opinion of Jaroslav Peregrin, the author defends the (...) thesis that this dispute can be resolved, in favor of realism. The arguments for realism are much more convincing, while constructivist arguments are baseless and at the same time lead to absurd consequences. (shrink)

The introductory section of the paper attempts to clarify the theoretical frame-work of truth-relativism. The paper then presents three obstacles to those who would like to relativise truth of a statement. These concern the distinction between absolutely and relatively true statements, the identity of a proposition across different perspectives and the possibility of distinguishing between various ways of construing the truth predicate.

[Donald Davidson: Action, Thought and Language.].

The paper distinguishes between various versions of conceptual relativism and tries to reduce their number to two final alternatives: those of weak and strong conceptual relativism. The author argues that while a weak, pluralist version of conceptual relativity might be acceptable, the stronger version, as defined in the paper, cannot be coherently formulated. The argument of the paper draws on recent criticism of conceptual relativism by Anthony Brueckner, and tries to extend it further.

The aim of the paper is twofold. First, it expounds the thesis of ‘conceptual relativity’ propounded in a series of writings of the well-known philosopher Hilary Putnam and indicates the alleged manner in which the thesis, according to Putnam, undermines the foundations of metaphysical realism (understood in a peculiar way spelled out in the paper). Second, a critical examination of Putnam’s anti-metaphysical-realist argument is offered. It is argued that Putnam offers examples only of a trivial, so-called indexical relativity, and that (...) his strategy leaves the foundations of metaphysical realism intact. (shrink)

Abstract: Daniel Wegner’s theory of apparent mental causation is often misread. His aim was not to question the causal effectiveness of conscious mental states like intentions. Rather, he attempted to show that our subjective sense of agency is not a completely reliable indicator of the actual causality of action, and needs to be replaced by more objective means of inquiry.

Elective abortion has become an issue of ethical and political debate in many countries including Mexico. As gynecologists are directly involved in the practice of abortion, it is important to know the psychological meaning that the term ‘elective abortion’ has for them. This study explores the psychological meaning and attitudes toward elective abortion of one hundred and twenty‐three Mexican gynecologists. We used the semantic networks technique, which analyzed the words the participants associated with the term ‘elective abortion’.The defining words most (...) frequently used by participants implied a negative sanction. There were important differences by gender and religiosity: male gynecologists, as well as those with strong religious beliefs (mainly Catholics), revealed a more negative psychological meaning and more negative attitudes than females or physicians with weak religious beliefs. A contribution of the present study is that it highlights the importance of psychology to enhancing understanding of the issue of elective abortion. (shrink)

In this article we aim to reconstruct some aspects of Davidson's idea of triangulation, and against this reconstruction, ask whether the idea is viciously circular. We begin by looking at the claim that without a triangularn setting, there is no saying what the cause of a being's responses is. In the first section we discuss the notion of relevant similarity, and what difference the presence of a second non‐linguistic being could make for the individuation of a common focus of attention. (...) In the second section we look at the role of a second person in language‐acquisition. It is important that being corrected to ‘go on as others do’ does not yet presuppose thought, and similarity standards can be applied to a learner's reactions even before she is aware of these standards. We also show why Davidson is not committed to any consensus view of correctness. In the last section we discern three charges of circularity that can be levelled against the idea of triangulation. We argue that Davidson can respond to the first two charges, and point to a way of answering the third. But the response we propound raises a new question, namely, why does the second being have to be a speaker or thinker even before the learner is aware of the three points of the triangle? (shrink)

In this article we aim to reconstruct some aspects of Davidson's idea of triangulation, and against this reconstruction, ask whether the idea is viciously circular. We begin by looking at the claim that without a triangularn setting, there is no saying what the cause of a being's responses is. In the first section we discuss the notion of relevant similarity, and what difference the presence of a second non‐linguistic being could make for the individuation of a common focus of attention. (...) In the second section we look at the role of a second person in language‐acquisition. It is important that being corrected to ‘go on as others do’ does not yet presuppose thought, and similarity standards can be applied to a learner's reactions even before she is aware of these standards. We also show why Davidson is not committed to any consensus view of correctness. In the last section we discern three charges of circularity that can be levelled against the idea of triangulation. We argue that Davidson can respond to the first two charges, and point to a way of answering the third. But the response we propound raises a new question, namely, why does the second being have to be a speaker or thinker even before the learner is aware of the three points of the triangle? (shrink)

Článek na příkladu názorů R. Descarta a J. Locka zkoumá, nakolik adekvátní je Rortyho kritická interpretace novověké „reprezentační epistemologie“. Autor postupně probírá čtyři Rortyho hlavní argumenty a dospívá k závěru, že některé z nich se míjí s názory raně novověkých filosofů.

Euthanasia has become the subject of ethical and political debate in many countries including Mexico. Since many physicians are deeply concerned about euthanasia, due to their crucial participation in its decision and implementation, it is important to know the psychological meaning that the term ‘euthanasia’ has for them, as well as their attitudes toward this practice. This study explores psychological meaning and attitudes toward euthanasia in 546 Mexican subjects, either medical students or physicians, who were divided into three groups: a) (...) beginning students, b) advanced students, and c) physicians. We used the semantic networks technique, which analyzed the words the participants associated with the term ‘euthanasia’. Positive psychological meaning, as well as positive attitudes, prevailed among advanced students and physicians when defining euthanasia, whereas both positive and negative psychological meaning together with more ambivalent attitudes toward euthanasia predominated in beginning students. The findings are discussed in the context of a current debate on a bill proposing active euthanasia in Mexico City. (shrink)

Text kriticky hodnotí tvrzení o pojmu fenomenálního vědomí, která jsou obsažena v šesté kapitole knihy Tomáše Hříbka Jaké to je, nebo o čem to je? Mým východiskem je teze Erica Schwitzgebela, že fenomenální vědomí můžeme definovat natolik neutrálně a minimalisticky, že se na jeho existenci mohou shodnout i teoretikové vědomí z velmi rozdílných táborů. Hříbek tento názor nesdílí, snažím se ale ukázat, že na základě lichých argumentů. Značnou pozornost v textu věnuji názorům Daniela Dennetta na podstatu vědomí, především pak „iluzionismu“ (...) jakožto teorii vědomí. Ten pokládám za teorii se značně nejasným obsahem a navrhuji, aby se o něm ve filozofii vědomí vedly soustředěné diskuze. (shrink)

The paper addresses the recurrent charge that Richard Rorty is a “linguistic idealist”. I show what the charge consists of and try to explain that there is a charitable reading of Rorty’s works, according to which he is not guilty of linguistic idealism. This reading draws on Putnam’s well-known conception of “internal realism” and accounts for the causal independence of the world on our linguistic practices. I also show how we can reconcile this causal independence of things and the sense (...) of our discourse being guided by them with our autonomy with regard to the construction of various “vocabularies” with which we describe, or cope with, reality. In the final part, I address in some detail Rorty’s animadversions concerning the idea of the intrinsic nature of reality. I show them to be only partly successful. (shrink)