There is no consensus yet on the definition of semantic information. This paper contributes to the current debate by criticising and revising the Standard Definition of semantic Information (SDI) as meaningful data, in favour of the Dretske‐Grice approach: meaningful and well‐formed data constitute semantic information only if they also qualify as contingently truthful. After a brief introduction, SDI is criticised for providing necessary but insufficient conditions for the definition of semantic information. SDI is incorrect because truth‐values do not supervene on (...) semantic information, and misinformation (that is, false semantic information) is not a type of semantic information, but pseudo‐information, that is not semantic information at all. This is shown by arguing that none of the reasons for interpreting misinformation as a type of semantic information is convincing, whilst there are compelling reasons to treat it as pseudo‐information. As a consequence, SDI is revised to include a necessary truth‐condition. The last section summarises the main results of the paper and indicates some interesting areas of application of the revised definition. (shrink)

Conscious visual perception can fail in many circumstances. However, little is known about the causes and processes leading to failures of visual awareness. In this study, we introduce a new signal detection measure termed subjective discriminability of invisibility that allows one to distinguish between subjective blindness due to reduction of sensory signals or to lack of attentional access to sensory signals. The SDI is computed based upon subjective confidence in reporting the absence of a target . Using this new measure, (...) we found that target misses were subjectively indistinguishable from physical absence when contrast reduction, backward masking and flash suppression were used, whereas confidence was appropriately modulated when dual task, attentional blink and spatial uncertainty methods were employed. These results show that failure of visual perception can be identified as either a result of perceptual or attentional blindness depending on the circumstances under which visual awareness was impaired. (shrink)

Humans think and communicate in very flexible and schematic ways, and a Spatial Data Infrastructure (SDI) for the Amazon and associated information system ontologies should reflect this flexibility and the adaptive nature of human cognition in order to achieve semantic interoperability. In this paper I offer a conceptual investigation of SDI and explore the nature of cultural schemas as expressions of indigenous ontologies and the challenges of semantic interoperability across cultures. Cultural schemas are, in essence, our ontologies, but they are (...) markedly different than classical formal ontologies. They shape our ontological commitments to what exists in the world as well as the ways in which we approach and engage the world. And while they help structure our understanding of the world in which we are embedded, they are associative and flexible. They help to focus our attention to particular details of our experiences and give them salience, yet they cannot be simply reduced to a series of extracted features. They allow us to make meaning of the contextualized, cultural experience in which we are always immersed. An SDI is a shared social-technological-informational structure that, if it is to be useful and successful for sustainability in the Amazon, must incorporate and use indigenous cultural schemas. Indigenous communities must have the ability to contribute to the collection of geospatial data and their contributions recognized as legitimate forms of knowledge. In order for the SDI to work, it must recognize the larger cultural landscape to which cultural schemas can connect to the ready-to-hand elements of salient cultural experiences. (shrink)

V rámci filosofie věd panuje široká shoda na tom, že druhá polovina 20. století složila „labutí píseň" pozitivismu. Milton Friedman a Paul Samuelson, dva klíčoví autoři k metodologii ekonomie v daném časovém období, přitom tento vývoj ve filosofii vědy prý nikdy nereflektovali. Pozitivistická východiska - v prvé řadě v podobě redukcioni- stického přístupu - jsou tudíž stále přítomna ve vlivných teoretických konceptech rozvinutých ekonomy hlavního proudu. Značný počet autorů však v současnosti sdílí náhled, že tyto koncepty v nezanedbatelné míře přispěly (...) k vývoji, jenž ústil ve finanční krizi, vrcholící v letech 2008 a 2009. Předkládaný článek se proto táže, zda to byla právě krize - v níž mnozí spatřují empirické zamítnutí řady pozitivistických konceptů - která napsala „labutí píseň" pozitivismu v ekonomii hlavního proudu. (shrink)

There is no consensus yet on the definition of semantic information. This paper contributes to the current debate by criticising and revising the Standard Definition of semantic Information as meaningful data, in favour of the Dretske-Grice approach: meaningful and well-formed data constitute semantic information only if they also qualify as contingently truthful. After a brief introduction, SDI is criticised for providing necessary but insufficient conditions for the definition of semantic information. SDI is incorrect because truth-values do not supervene on semantic (...) information, and misinformation is not a tyoe of semantic information, but pseudo-information, that is not semantic information at all. This is shown by arguing that none of the reasons for interpreting misinformation as a type of semantic information is convincing, whilst there are compelling reasons to treat it as pseudo-information. As a consequence, SDI is revised to include a necessary truth-condition. The last section summarises the main results of the paper and indicates the important implications of the revised definition for the analysis of the deflationary theories of truth, the standard definition of knowledge and the classic, quantitative theory of semantic information. (shrink)

Many people have misgivings about the strategy of nuclear deterrence. Some of those misgivings centre on issues of effectiveness: safety depends entirely upon the dissuasion of an adversary. Other misgivings centre on moral concerns: the essence of deterrence is the threat, and the conditional intention, to kill millions of noncombatants. US President Reagan's Strategic Defence Initiative promised an alternative to deterrence, a strategic posture of interception of an adversary's weapons rather than preclusion of the decision to attack. It is conceived (...) as a means of ‘defending’ the United States that does not threaten anyone. In this essay I examine various SDI proposals. I argue that only one of these could justify the transition to a strategic posture of ‘defence’, and might be a genuine alternative to deterrence—the one that is least feasible technologically. Only that one could plausibly be claimed to be morally superior to deterrence—and for strategic reasons, even its claim is dubious at best. Technologically more feasible proposals are not ‘defences’, but variants of deterrence. Since that is so, the most common and dramatic claim of their moral superiority to deterrence is incoherent. (shrink)

The Baptism of the Bomb Here is a two-step plan to rescue nuclear war from immorality. First, the United States should build the most moral offensive nuclear weapons that money can buy and bring nuclear warfare into compliance with the principle of noncombatant immunity. Then it should build a defensive “shield” that will make offensive nuclear weapons “impotent and obsolete” and take the world “beyond deterrence.” In this second stage, called the “Strategic Defense Initiative” by believers and “Star Wars” by (...) doubters, antimissile technology will confront missile technology like a Hegelian antithesis confronting its thesis, and we will all be lifted up out of the age of nuclear war into a realm made safe for conventional war. 1 Even according to believers in the SDI, however, intermediate deployment, not to mention full deployment, of a strategic defense is some time away, pending breakthroughs on technological problems at which public money is now being thrown. (shrink)

This important collection of essays brings together the work of prominent philosophers, political scientists, policy analysts, and defence consultants. It takes as its point of departure two central tendencies in current nuclear strategy: mutual assured destruction and nuclear utilization target selections. The essays examine and assess the arguments for these and other positions on the spectrum of policy options, and elaborate the implications of this analysis for strategic policy and for the further pursuit of research into SDI, and other matters.

This essay proposes a cultural and historical explanation for the American Military's fascination with computing. Three key elements of post-WWII US political culture — apocalyptic struggle with the USSR, subsuming all other conflicts: a long history of antimilitarist sentiment in American politics; and the rise of science-based military power — contributed to a sense of the world as a closed system accessible to American technological control. A developing scientific systems discourse, centrally including computer science and AI, was adopted for strategic (...) thinking and military technology. The Strategic Computing and Strategic Defense Initiatives are discussed as contemporary examples of this conjunction. (shrink)