Logical Space and the Space of Sight: The Relevance of Wittgenstein's Arguments to Recent Issues in the Philosophy of Mind

Dialogue ◽  
2008 ◽  
Vol 47 (3-4) ◽  
pp. 501-536 ◽  
Author(s):  
Ludovic Soutif
Keyword(s):  
Visual Field ◽  
Spatial Structure ◽  
Philosophy Of Mind ◽  
Critical Role ◽  
Phenomenological Description ◽  
Simultaneous Presence ◽  
Logical Space ◽  
Independent Account

ABSTRACTIn this article, I show and discuss the relevance of Wittgenstein's arguments as to the spatial structure of sight to recent issues in the philosophy of mind. The first, bearing upon the dimensionality of the manifolds at play in depiction, plays a critical role in Clark's attempt to provide an independent account of qualia and of their differentiative properties. The second, pertaining to the properly spatial structure formed by the data of sight, is explicitly appealed to in the debate on the realistic character of any genuinely spatial scheme. I argue that if Wittgenstein rightly assumes that the simultaneous presence of sensible places in vision is a key condition for objectivity, he fails nevertheless to warrant the allegedly realistic character of the scheme employed in his own search for a phenomenological description of the visual field.

Copernican Revolution in Physics and Cosmology: Vantage Point from beyond Earth

2018 ◽  
pp. 351-376
Author(s):  
Georg Northoff
Keyword(s):  
Philosophy Of Mind ◽  
Body Problem ◽  
Vantage Point ◽  
Logical Space ◽  
Copernican Revolution ◽  
The World ◽  
Pulling Forces ◽  
World Brain ◽  
Mind Body Problem ◽  
The Mind

Why do we so stubbornly cling to the assumption of mind? Despite the so far presented empirical, ontological, and conceptual-logical evidence against mind, the philosopher may nevertheless reject the world-brain problem as counter-intuitive. She/he will argue that we need to approach the question for the existence and reality of mental features in terms of the mind-body problem as it is more intuitive than the world-brain problem. Our strong adherence to mind is thus, at least in part, based on what philosophers describe as “intuition”, the “intuition of mind” as I say. How can we resist and escape the pulling forces of our “intuition of mind”? The main focus in this chapter and the whole final part is on the “intuition of mind” and how we can avoid and render it impossible. I will argue that we need to exclude the mind as possible epistemic option from our knowledge, i.e., the “logical space of knowledge”, as I say. The concept of “logical space of knowledge” concerns what we can access in our knowledge, i.e., our possible epistemic options that are included in the “logical space of knowledge”, as distinguished from what remains inaccessible to us, i.e., impossible epistemic options, as they are excluded from the “logical space of knowledge”. For instance, the “logical space of knowledge” presupposed in current philosophy of mind and specifically mind-body discussion includes mind as possible epistemic option while world-brain relation is excluded as impossible epistemic option. This, as I argue, provides the basis for our “intuition of mind” and the seemingly counterintuitive nature of world-brain relation. How can we modify and change the possible and impossible epistemic options in our “logical space of knowledge”? I argue that this is possible by shifting our vantage point or viewpoint - that is paradigmatically reflected in the Copernican revolution in cosmology and physics. Copernicus shifted the “vantage point from within earth” to a “vantage point beyond earth”; this enabled him to take into view that the earth (rather than the sun) moves by itself which provided the basis for his shift from a geo- to a helio-centric view of the universe. Hence, the shift in vantage point modified his epistemic options and thus expanded the presupposed “logical space of knowledge”. I conclude that we require an analogous shift in the vantage point we currently presuppose in philosophy of mind. This will expand our “logical space of knowledge” in such way that makes possible to include world-brain relation as possible epistemic option while, at the same time, excluding mind as impossible epistemic option. That, in turn, will render the world-brain problem more intuitive while the mind-body problem will then be rather counter-intuitive. Taken together, this amounts to nothing less than a Copernican revolution in neuroscience and philosophy – that shall be the focus in next chapter.

scholarly journals On the Other Hand…: Enhancing Promotional Effectiveness with Haptic Cues

2019 ◽  
Vol 57 (1) ◽  
pp. 100-117
Author(s):  
Virginie Maille ◽  
Maureen Morrin ◽  
Ryann Reynolds-McIlnay
Keyword(s):  
Visual Field ◽  
Critical Role ◽  
The Other ◽  
Dominant Hand ◽  
Other Hand ◽  
Perceived Ownership ◽  
The Creation ◽  
Haptic Cues ◽  
Hand Action

People like graspable objects more when the objects are located on the dominant-hand side of their body or when the handles point toward their dominant-hand side. However, many products do not have handles or are not graspable (e.g., services, objects hanging on the wall). Can nongraspable products nevertheless benefit from the effects of appealing to viewers’ dominant hands? The present research shows that, yes, consumers respond more positively to nongraspable products if a haptic cue (an object that is graspable or suggestive of hand action) is located within the same visual field as the target and is positioned to appeal to the viewer’s dominant hand. This result is driven by the creation and transfer of perceived ownership from cue to target. These findings extend the use of haptic cues to nongraspable products and uncover the critical role played by perceived ownership, including its ability to transfer from one object to another located in the same visual field. Moreover, the current research demonstrates situations in which the use of haptic cues will not enhance response.

scholarly journals Topographic Organization for Delayed Saccades in Human Posterior Parietal Cortex

2005 ◽  
Vol 94 (2) ◽  
pp. 1372-1384 ◽  
Author(s):  
Denis Schluppeck ◽  
Paul Glimcher ◽  
David J. Heeger
Keyword(s):  
Visual Field ◽  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Target Location ◽  
Critical Role ◽  
Topographic Maps ◽  
Field Orientation ◽  
Topographic Organization ◽  
Motor Intention ◽  
Posterior Parietal

Posterior parietal cortex (PPC) is thought to play a critical role in decision making, sensory attention, motor intention, and/or working memory. Research on the PPC in non-human primates has focused on the lateral intraparietal area (LIP) in the intraparietal sulcus (IPS). Neurons in LIP respond after the onset of visual targets, just before saccades to those targets, and during the delay period in between. To study the function of posterior parietal cortex in humans, it will be crucial to have a routine and reliable method for localizing specific parietal areas in individual subjects. Here, we show that human PPC contains at least two topographically organized regions, which are candidates for the human homologue of LIP. We mapped the topographic organization of human PPC for delayed (memory guided) saccades using fMRI. Subjects were instructed to fixate centrally while a peripheral target was briefly presented. After a further 3-s delay, subjects made a saccade to the remembered target location followed by a saccade back to fixation and a 1-s inter-trial interval. Targets appeared at successive locations “around the clock” (same eccentricity, ≈30° angular steps), to produce a traveling wave of activity in areas that are topographically organized. PPC exhibited topographic organization for delayed saccades. We defined two areas in each hemisphere that contained topographic maps of the contra-lateral visual field. These two areas were immediately rostral to V7 as defined by standard retinotopic mapping. The two areas were separated from each other and from V7 by reversals in visual field orientation. However, we leave open the possibility that these two areas will be further subdivided in future studies. Our results demonstrate that topographic maps tile the cortex continuously from V1 well into PPC.

Bias for the Left Visual Field in Rapid Serial Visual Presentation: Effects of Additional Salient Cues Suggest a Critical Role of Attention

2015 ◽  
Vol 27 (2) ◽  
pp. 266-279 ◽  
Author(s):  
Kamila Śmigasiewicz ◽  
Dariusz Asanowicz ◽  
Nicole Westphal ◽  
Rolf Verleger
Keyword(s):  
Visual Field ◽  
Left Visual Field ◽  
Right Hemisphere ◽  
Critical Role ◽  
Visual Presentation ◽  
The Other ◽  
Early Posterior Negativity ◽  
Left And Right ◽  
The Right

Everyday experience suggests that people are equally aware of stimuli in both hemifields. However, when two streams of stimuli are rapidly presented left and right, the second target (T2) is better identified in the left hemifield than in the right hemifield. This left visual field (LVF) advantage may result from differences between hemifields in attracting attention. Therefore, we introduced a visual cue shortly before T2 onset to draw attention to one stream. Thus, to identify T2, attention was correctly positioned with valid cues but had to be redirected to the other stream with invalid ones. If the LVF advantage is caused by differences between hemifields in attracting attention, invalid cues should increase, and valid cues should reduce the LVF advantage as compared with neutral cues. This prediction was confirmed. ERP analysis revealed that cues evoked an early posterior negativity, confirming that attention was attracted by the cue. This negativity was earlier with cues in the LVF, which suggests that responses to salient events are faster in the right hemisphere than in the left hemisphere. Valid cues speeded up, and invalid cues delayed T2-evoked N2pc; in addition, valid cues enlarged T2-evoked P3. After N2pc, right-side T2 evoked more sustained contralateral negativity than left T2, least long-lasting after valid cues. Difficulties in identifying invalidly cued right T2 were reflected in prematurely ending P3 waveforms. Overall, these data provide evidence that the LVF advantage is because of different abilities of the hemispheres in shifting attention to relevant events in their contralateral hemifield.

scholarly journals Kin-dependent dispersal influences relatedness and genetic structuring in a lek system

2019 ◽  
Author(s):  
Hugo Cayuela ◽  
Laurent Boualit ◽  
Martin Laporte ◽  
Jérôme G. Prunier ◽  
Françoise Preiss ◽  
...  
Keyword(s):  
Spatial Structure ◽  
Kin Selection ◽  
Critical Role ◽  
Dispersal Distance ◽  
Structured Populations ◽  
Breeding Systems ◽  
Genetic Structuring ◽  
Limited Dispersal ◽  
Dispersal Distances ◽  
Population Viscosity

AbstractKin selection and dispersal play a critical role in the evolution of cooperative breeding systems. Limited dispersal dramatically increases relatedness in spatially structured populations (population viscosity), with the result that neighbours tend to be genealogical relatives. Yet the increase in neighbours’ performance through altruistic interaction may also result in habitat saturation and thus exacerbate local competition between kin. Our goal was to detect the footprint of kin selection and competition by examining the spatial structure of relatedness and by comparing non-effective and effective dispersal in a population of a lekking bird, Tetrao urogallus. For this purpose, we analysed capture–recapture and genetic data collected over a 6-year period on a spatially structured population of T. urogallus in France. Our findings revealed a strong spatial structure of relatedness in males. They also indicated that the population viscosity allowed male cooperation through two non-exclusive mechanisms. First, at their first lek attendance, males aggregate in a lek composed of relatives. Second, the distance corresponding to non-effective dispersal dramatically outweighed effective dispersal distance, which suggests that dispersers incur high post-settlement costs. These two mechanisms result in strong population genetic structuring in males. In females, our findings revealed a lower level of spatial structure of relatedness and genetic structure in respect to males. Additionally, non-effective dispersal and effective dispersal distances in females were highly similar, which suggests limited post-settlement costs. These results indicate that kin-dependent dispersal decisions and costs are factors driving the evolution of cooperative courtship and have a genetic footprint in wild populations.

scholarly journals Is the Horizontal-Vertical Illusion Mainly a By-Product of Petter’s Rule?

Symmetry ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 6 ◽  
Author(s):  
Alessandra Pecunioso ◽  
Christian Agrillo
Keyword(s):  
Visual Field ◽  
Critical Role ◽  
Two Dimensions ◽  
Size Constancy ◽  
Two Dimensional ◽  
Binocular Visual Field

The horizontal-vertical (HV) illusion is a classical example of an asymmetrical perception of size in the vertical and horizontal axes, also known as ‘anisotropy of the perceived space’. Several authors argued that the horizontally-oriented ellipse of the binocular visual field might play an important role in the emergence of this illusion. Alternatively, a length bisection bias and size-constancy mechanisms have been advocated to account for the asymmetrical perception in the two dimensions. To investigate this phenomenon, participants are commonly required to estimate the length of two separate lines, one vertical and one horizontal, often arranged in an inverted-T pattern. Here we suggest that this type of stimulus may introduce physical and subjective biases that prevent a fine investigation. In particular, we believe that Petter’s rule, that applies to two-dimensional patterns formed by two overlapping surfaces, may play a critical role that will not support an interpretation based on the shape of the binocular visual field nor a length bisection bias.

Observations of the spatial structure of interstellar hydrogen

1967 ◽  
Vol 31 ◽  
pp. 45-46
Author(s):  
Carl Heiles
Keyword(s):  
High Resolution ◽  
Spatial Structure ◽  
Velocity Dispersion ◽  
Temperature Variations

High-resolution 21-cm line observations in a region aroundlII= 120°,b11= +15°, have revealed four types of structure in the interstellar hydrogen: a smooth background, large sheets of density 2 atoms cm-3, clouds occurring mostly in groups, and ‘Cloudlets’ of a few solar masses and a few parsecs in size; the velocity dispersion in the Cloudlets is only 1 km/sec. Strong temperature variations in the gas are in evidence.

Dexamethasone Effect on Embryonic Chick Respiratory Epithelium

1982 ◽  
Vol 40 ◽  
pp. 248-249
Author(s):  
M.R. Richter ◽  
R.V. Blystone
Keyword(s):  
Lung Development ◽  
Critical Role ◽  
Respiratory Epithelium ◽  
Chick Embryos ◽  
Embryonic Chick ◽  
White Leghorn ◽  
Lung Maturation ◽  
Synthetic Analogs ◽  
Lung Physiology ◽  
Avian Lung

Dexamethasone and other synthetic analogs of corticosteroids have been employed clinically as enhancers of lung development. The mechanism(s) by which this steroid induction of later lung maturation operates is not clear. This study reports the effect on lung epithelia of dexamethasone administered at different intervals during development. White Leghorn chick embryos were used so as to remove possible maternal and placental influences on the exogenously applied steroid. Avian lung architecture does vary from mammals; however, respiratory surfactant produced by the lung epithelia serves an equally critical role in avian lung physiology.

An atomic resolution study of a carbide phase in platinum

1992 ◽  
Vol 50 (1) ◽  
pp. 20-21
Author(s):  
M.J. Witcomb ◽  
M.A. O'Keefe ◽  
CJ. Echer ◽  
C. Nelson ◽  
J.H. Turner ◽  
...  
Keyword(s):  
Solid Solution ◽  
Carbon Atom ◽  
Carbide Phase ◽  
Structural Changes ◽  
Critical Role ◽  
Alloy System ◽  
Atomic Resolution ◽  
Excess Carbon ◽  
Interstitial Carbon ◽  
Resolution Study

Under normal circumstances, Pt dissolves only a very small amount of interstitial carbon in solid solution. Even so, an appropriate quench/age treatment leads to the formation of stable Pt2C {100} plate precipitates. Excess (quenched-in) vacancies play a critical role in the process by accommodating the volume and structural changes that accompany the transformation. This alloy system exhibits other interesting properties. Due to a large vacancy/carbon atom binding energy, Pt can absorb excess carbon at high temperatures in a carburizing atmosphere. In regions rich in carbon and vacancies, another carbide phase, Pt7C which undergoes an order-disorder reaction was formed. The present study of Pt carburized at 1160°C and aged at 515°C shows that other carbides in the PtxC series can be produced.

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