This paper investigates the question whether we could have reason to believe that time is two-dimensional. I connect discussion of this question to discussion of the question whether we could have reason to believe that there has been a global time freeze.

What is the class of possible semiotic systems? What kinds of systems could count as such systems? The human mind is naturally considered the prototypical semiotic system. During years of research in semiotics the class has been broadened to include i.e. living systems like animals, or even plants. It is suggested in the literature on artificial intelligence that artificial agents are typical examples of symbol-processing entities. It also seems that semiotic processes are in fact cognitive processes. In consequence, it is (...) natural to ask the question about the relation between semiotic studies and research on artificial cognitive systems within cognitive science. Consequently, my main question concerns the problem of inclusion or exclusion from the semiotic spectrum at least some artificial systems. I would like to consider some arguments against the possibility of artificial semiotic systems and I will try to repeal them. Then I will present an existing natural-language using agent of the SNePS system and interpret it in terms of Peircean theory of signs. I would like also to show that some properties of semiotic systems in Peircean sense could be also found in a discussed artificial system. Finally, I will have some remarks on the status of semiotics in general. (shrink)

The aim of this article is to strengthen links between cognitive brain research and formal logic. The work covers three fundamental sorts of logical inferences: reasoning in the propositional calculus, i.e. inferences with the conditional “if...then”, reasoning in the predicate calculus, i.e. inferences based on quantifiers such as “all”, “some”, “none”, and reasoning with n-place relations. Studies with brain-damaged patients and neuroimaging experiments indicate that such logical inferences are implemented in overlapping but different bilateral cortical networks, including parts of the (...) fronto-temporal cortex, the posterior parietal cortex, and the visual cortices. I argue that these findings show that we do not use a single deterministic strategy for solving logical reasoning problems. This account resolves many disputes about how humans reason logically and why we sometimes deviate from the norms of formal logic. (shrink)

The essay which follows is about the relationship between mind and language. Most recent thought about intentionality has it that (i) mental states of individuals are largely, or in the most fundamental cases, independent of social facts about public languages, and (ii) these social facts are derived from, or constituted by, the mental states of individuals. The purpose of this essay is to challenge this individualist orthodoxy (as well as the view of the relationship between mind and action which often (...) accompanies it), and suggest in its place a communitarian picture of intentionality which gives public languages a role to play in the constitution of thought. (shrink)

Yüzyıllardır tartışılagelen zihin-beden sorunu, günümüzde bilinç ve beyin arasındaki etkileşim problemi olarak ele alınmaktadır. Ortaya konan nörolojik verilerden hareketle, tamamen maddi bir organ olan beyin ile fiziksel özellikler taşımayan bilinç arasında, nasıl bir ilişki olduğunu açıklamak için felsefi kuramlar ileri sürülmektedir. Bu kuramlardan bazıları, bilinç ile beynin birbirinden tamamen bağımsız olduğunu iddia eden düalist kuramlardır. Bazıları ise, bu bağımsızlığı reddederek ikisinden birini diğerine indirgeme yolu ile çözüme ulaşmaya çalışan monist kuramlardır. Bu çalışmada, beyin-bilinç ilişkisini açıklamaya çalışan çağdaş felsefi kuramlar ele (...) alınacaktır. (shrink)

The term “consciousness” is very often, though not always, interchangeable with the term “awareness,” which is more colloquial to many ears. We say things like “are you aware that ...” often. Sometimes we say “have you noticed that ... ?” to express similar thoughts, and this indicates a close connection between consciousness (awareness) and attention (noticing), which we will come back to later in this chapter. Ned Block, one of the key figures in this area, provides a useful characterization of (...) what he calls “phenomenal consciousness.” For him, phenomenal consciousness is experience. Experience covers perceptions, e.g., when we see, hear, touch, smell, and taste, we typically have experiences, such as seeing colors and smelling odors. It also covers bodily awareness, e.g., we typically have experiences of our own bodily temperature and positions of limbs. Consciousness is primarily about this experiential aspect of our mental lives. (shrink)

Much of contemporary philosophy of mind is dominated by the intersection of three topics: physicalism, the conceivability argument, and the necessary a posteriori. I will be concerned here to describe the consensus view of these topics; to explain why I think this account is mistaken; and to briefly sketch an alternative.

What does ordinary language philosophy contribute to the solution of the problems it diagnoses as violations of linguistic use? One of its biggest challenges has been to account for the epistemic asymmetry of mental states experienced by the subject of those states and the application of psychological properties to others. The epistemology of other minds appears far from resolved with reference to how sensation words are used in everyday language. In this paper, I revisit the Wittgensteinian arguments and show how (...) they engage the ordinary language method (in the modified form of grammatical investigation) to ‘dissolve’ the problem. Several important results are generated by way of this reconstruction. An expressive view of the vocabulary of sensation is defended which facilitates a discussion of sensation discourse emphasising the normative grammatical conditions for the communication of psychological states. This motivates a reassessment of criterial justification for the ascription of psychological concepts in the third person. In the final sections, I mobilise a normative approach to expose the moral relevance of the epistemology of other minds. Even if it is conceded that belief in other minds lacks warrant from an epistemological standpoint, this does not justify adopting the skeptical attitude from an ethical standpoint. In light of this, a normative justification for the a priori belief that others are subjects of consciousness is defended. (shrink)