Symbols, Computation, and Intentionality

Download Symbols, Computation, and Intentionality PDF Online Free

Author :
Publisher : Steven Horst
ISBN 13 : 0984017631
Total Pages : 452 pages
Book Rating : 4.9/5 (84 download)

DOWNLOAD NOW!


Book Synopsis Symbols, Computation, and Intentionality by : Steven Horst

Download or read book Symbols, Computation, and Intentionality written by Steven Horst and published by Steven Horst. This book was released on 2011-09-09 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Nature of Meaningfulness

Download The Nature of Meaningfulness PDF Online Free

Author :
Publisher : Rowman & Littlefield
ISBN 13 : 9780847692873
Total Pages : 358 pages
Book Rating : 4.6/5 (928 download)

DOWNLOAD NOW!


Book Synopsis The Nature of Meaningfulness by : Robert K. Shope

Download or read book The Nature of Meaningfulness written by Robert K. Shope and published by Rowman & Littlefield. This book was released on 1999 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shope presents a unified perspective on meaningfulness, spanning such varied topics as the meaningfulness of linguistic expressions and conventional signs, Freud's conception of the meaningfulness of various mental phenomena and instances of behavior, a person's meaning to do something, meaning in the arts, and even life's having a meaning. Shope's perspective is based upon a 'constitutive' analysis of what it is for one item to represent another. Criticizing the views of philosophers who attempt to analyze such representing in causal terms, or merely in epistemological terms, he shows that a successful analysis needs to invoke both types of considerations.

Minds, Brains and Science

Download Minds, Brains and Science PDF Online Free

Author :
Publisher : Harvard University Press
ISBN 13 : 0674267214
Total Pages : 116 pages
Book Rating : 4.6/5 (742 download)

DOWNLOAD NOW!


Book Synopsis Minds, Brains and Science by : John R. Searle

Download or read book Minds, Brains and Science written by John R. Searle and published by Harvard University Press. This book was released on 1986-01-01 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Minds, Brains and Science takes up just the problems that perplex people, and it does what good philosophy always does: it dispels the illusion caused by the specious collision of truths. How do we reconcile common sense and science? John Searle argues vigorously that the truths of common sense and the truths of science are both right and that the only question is how to fit them together. Searle explains how we can reconcile an intuitive view of ourselves as conscious, free, rational agents with a universe that science tells us consists of mindless physical particles. He briskly and lucidly sets out his arguments against the familiar positions in the philosophy of mind, and details the consequences of his ideas for the mind-body problem, artificial intelligence, cognitive science, questions of action and free will, and the philosophy of the social sciences.

The Language of Thought

Download The Language of Thought PDF Online Free

Author :
Publisher : MIT Press
ISBN 13 : 0262527456
Total Pages : 272 pages
Book Rating : 4.2/5 (625 download)

DOWNLOAD NOW!


Book Synopsis The Language of Thought by : Susan Schneider

Download or read book The Language of Thought written by Susan Schneider and published by MIT Press. This book was released on 2015-01-30 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: A philosophical refashioning of the Language of Thought approach and the related computational theory of mind. The language of thought (LOT) approach to the nature of mind has been highly influential in cognitive science and the philosophy of mind; and yet, as Susan Schneider argues, its philosophical foundations are weak. In this philosophical refashioning of LOT and the related computational theory of mind (CTM), Schneider offers a different framework than has been developed by LOT and CTM's main architect, Jerry Fodor: one that seeks integration with neuroscience, repudiates Fodor's pessimism about the capacity of cognitive science to explain cognition, embraces pragmatism, and advances a different approach to the nature of concepts, mental symbols, and modes of presentation. According to the LOT approach, conceptual thought is determined by the manipulation of mental symbols according to algorithms. Schneider tackles three key problems that have plagued the LOT approach for decades: the computational nature of the central system (the system responsible for higher cognitive function); the nature of symbols; and Frege cases. To address these problems,] Schneider develops a computational theory that is based on the Global Workspace approach; develops a theory of symbols, "the algorithmic view"; and brings her theory of symbols to bear on LOT's account of the causation of thought and behavior. In the course of solving these problems, Schneider shows that LOT must make peace with both computationalism and pragmatism; indeed, the new conception of symbols renders LOT a pragmatist theory. And LOT must turn its focus to cognitive and computational neuroscience for its naturalism to succeed.

The MIT Encyclopedia of the Cognitive Sciences (MITECS)

Download The MIT Encyclopedia of the Cognitive Sciences (MITECS) PDF Online Free

Author :
Publisher : MIT Press
ISBN 13 : 9780262731447
Total Pages : 1106 pages
Book Rating : 4.7/5 (314 download)

DOWNLOAD NOW!


Book Synopsis The MIT Encyclopedia of the Cognitive Sciences (MITECS) by : Robert A. Wilson

Download or read book The MIT Encyclopedia of the Cognitive Sciences (MITECS) written by Robert A. Wilson and published by MIT Press. This book was released on 2001-09-04 with total page 1106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the 1970s the cognitive sciences have offered multidisciplinary ways of understanding the mind and cognition. The MIT Encyclopedia of the Cognitive Sciences (MITECS) is a landmark, comprehensive reference work that represents the methodological and theoretical diversity of this changing field. At the core of the encyclopedia are 471 concise entries, from Acquisition and Adaptationism to Wundt and X-bar Theory. Each article, written by a leading researcher in the field, provides an accessible introduction to an important concept in the cognitive sciences, as well as references or further readings. Six extended essays, which collectively serve as a roadmap to the articles, provide overviews of each of six major areas of cognitive science: Philosophy; Psychology; Neurosciences; Computational Intelligence; Linguistics and Language; and Culture, Cognition, and Evolution. For both students and researchers, MITECS will be an indispensable guide to the current state of the cognitive sciences.

Languages of Intentionality

Download Languages of Intentionality PDF Online Free

Author :
Publisher : Bloomsbury Publishing
ISBN 13 : 1441151796
Total Pages : 256 pages
Book Rating : 4.4/5 (411 download)

DOWNLOAD NOW!


Book Synopsis Languages of Intentionality by : Paul S. MacDonald

Download or read book Languages of Intentionality written by Paul S. MacDonald and published by Bloomsbury Publishing. This book was released on 2012-06-28 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intentionality - the relationship between conscious states and their objects - is one of the most discussed topics in contemporary debates in philosophy of mind, cognitive neuroscience and the study of consciousness. Long a foundational concept in Phenomenology, it has also received considerable coverage in the writings of analytic philosophers. This book is the first study to offer an impartial, well-informed assessment of the two traditions' approaches through an in-depth investigation of the principal thinkers' ideas, so that their positions emerge side-by-side, converging and diverging on certain shared themes. Beginning with a historical discussion of the development of the term in the work of Continental thinkers in the 19th and early 20th centuries, the book considers the work of Brentano and Husserl and subsequent existentialist critiques. From there, it explores how empirical-analytic philosophers took up the topic, drawn as they were to materialist and computer models of the mind. Finally MacDonald presents a new 'hybrid' account of intentionality that will be a crucial work for scholars working on consciousness and the mind.

The Sources of Intentionality

Download The Sources of Intentionality PDF Online Free

Author :
Publisher : Oxford University Press
ISBN 13 : 0199380317
Total Pages : 286 pages
Book Rating : 4.1/5 (993 download)

DOWNLOAD NOW!


Book Synopsis The Sources of Intentionality by : Uriah Kriegel

Download or read book The Sources of Intentionality written by Uriah Kriegel and published by Oxford University Press. This book was released on 2014-05 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: What do thoughts, hopes, paintings, words, desires, photographs, traffic signs, and perceptions have in common? They are all about something, are directed, are contentful - in a way chairs and trees, for example, are not. This book inquires into the source of this power of directedness that some items exhibit while others do not. An approach to this issue prevalent in the philosophy of the past half-century seeks to explain the power of directedness in terms of certain items' ability to reliably track things in their environment. A very different approach, with a venerable history and enjoying a recent resurgence, seeks to explain the power of directedness rather in terms of an intrinsic ability of conscious experience to direct itself. This book attempts a synthesis of both approaches, developing an account of the sources of such directedness that grounds it both in reliable tracking and in conscious experience.

The Mechanical Mind

Download The Mechanical Mind PDF Online Free

Author :
Publisher : Presbyterian Publishing Corp
ISBN 13 : 0203426312
Total Pages : 272 pages
Book Rating : 4.2/5 (34 download)

DOWNLOAD NOW!


Book Synopsis The Mechanical Mind by : Tim Crane

Download or read book The Mechanical Mind written by Tim Crane and published by Presbyterian Publishing Corp. This book was released on 2003-04-24 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fascinating exploration of the theories and arguments surrounding the notions of thought and representation. Now in its 2nd edition, Cranes's classic text has introduced thousands to some of the most important ideas in philosophy of mind.

Physical Computation

Download Physical Computation PDF Online Free

Author :
Publisher : OUP Oxford
ISBN 13 : 0191633429
Total Pages : 336 pages
Book Rating : 4.1/5 (916 download)

DOWNLOAD NOW!


Book Synopsis Physical Computation by : Gualtiero Piccinini

Download or read book Physical Computation written by Gualtiero Piccinini and published by OUP Oxford. This book was released on 2015-07-02 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gualtiero Piccinini articulates and defends a mechanistic account of concrete, or physical, computation. A physical system is a computing system just in case it is a mechanism one of whose functions is to manipulate vehicles based solely on differences between different portions of the vehicles according to a rule defined over the vehicles. The Nature of Computation discusses previous accounts of computation and argues that the mechanistic account is better. Many kinds of computation are explicated, such as digital vs. analog, serial vs. parallel, neural network computation, program-controlled computation, and more. Piccinini argues that computation does not entail representation or information processing although information processing entails computation. Pancomputationalism, according to which every physical system is computational, is rejected. A modest version of the physical Church-Turing thesis, according to which any function that is physically computable is computable by Turing machines, is defended.

Contingent Computation

Download Contingent Computation PDF Online Free

Author :
Publisher : Rowman & Littlefield
ISBN 13 : 1786606097
Total Pages : 249 pages
Book Rating : 4.7/5 (866 download)

DOWNLOAD NOW!


Book Synopsis Contingent Computation by : M. Beatrice Fazi

Download or read book Contingent Computation written by M. Beatrice Fazi and published by Rowman & Littlefield. This book was released on 2018-11-15 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Contingent Computation, M. Beatrice Fazi offers a new theoretical perspective through which we can engage philosophically with computing. The book proves that aesthetics is a viable mode of investigating contemporary computational systems. It does so by advancing an original conception of computational aesthetics that does not just concern art made by or with computers, but rather the modes of being and becoming of computational processes. Contingent Computation mobilises the philosophies of Gilles Deleuze and Alfred North Whitehead in order to address aesthetics as an ontological study of the generative potential of reality. Through a novel philosophical reading of Gödel’s incompleteness theorems and of Turing’s notion of incomputability, Fazi finds this potential at the formal heart of computational systems, and argues that computation is a process of determining indeterminacy. This indeterminacy, which is central to computational systems, does not contradict their functionality. Instead, it drives their very operation, albeit in a manner that might not always fit with the instrumental, representational and cognitivist purposes that we have assigned to computing.

Computing Nature

Download Computing Nature PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 3642372252
Total Pages : 268 pages
Book Rating : 4.6/5 (423 download)

DOWNLOAD NOW!


Book Synopsis Computing Nature by : Gordana Dodig-Crnkovic

Download or read book Computing Nature written by Gordana Dodig-Crnkovic and published by Springer Science & Business Media. This book was released on 2013-03-21 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about nature considered as the totality of physical existence, the universe, and our present day attempts to understand it. If we see the universe as a network of networks of computational processes at many different levels of organization, what can we learn about physics, biology, cognition, social systems, and ecology expressed through interacting networks of elementary particles, atoms, molecules, cells, (and especially neurons when it comes to understanding of cognition and intelligence), organs, organisms and their ecologies? Regarding our computational models of natural phenomena Feynman famously wondered: “Why should it take an infinite amount of logic to figure out what one tiny piece of space/time is going to do?” Phenomena themselves occur so quickly and automatically in nature. Can we learn how to harness nature’s computational power as we harness its energy and materials? This volume includes a selection of contributions from the Symposium on Natural Computing/Unconventional Computing and Its Philosophical Significance, organized during the AISB/IACAP World Congress 2012, held in Birmingham, UK, on July 2-6, on the occasion of the centenary of Alan Turing’s birth. In this book, leading researchers investigated questions of computing nature by exploring various facets of computation as we find it in nature: relationships between different levels of computation, cognition with learning and intelligence, mathematical background, relationships to classical Turing computation and Turing’s ideas about computing nature - unorganized machines and morphogenesis. It addresses questions of information, representation and computation, interaction as communication, concurrency and agent models; in short this book presents natural computing and unconventional computing as extension of the idea of computation as symbol manipulation.

The Routledge Companion to Philosophy of Psychology

Download The Routledge Companion to Philosophy of Psychology PDF Online Free

Author :
Publisher : Routledge
ISBN 13 : 1134155794
Total Pages : 701 pages
Book Rating : 4.1/5 (341 download)

DOWNLOAD NOW!


Book Synopsis The Routledge Companion to Philosophy of Psychology by : Sarah Robins

Download or read book The Routledge Companion to Philosophy of Psychology written by Sarah Robins and published by Routledge. This book was released on 2009-09-11 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Routledge Companion to Philosophy of Psychology is an invaluable guide and major reference source to the major topics, problems, concepts and debates in philosophy of psychology and is the first companion of its kind. A team of renowned international contributors provide forty-two chapters organised into six clear parts: I. Historical background to the philosophy of psychology II. Psychological explanation III. Cognition and representation IV. The biological basis of psychology V. Perceptual experience VI. Personhood The Companion covers key topics such as the origins of experimental psychology; folk psychology; behaviorism and functionalism; philosophy, psychology and neuroscience; the language of thought, modularity, nativism and representational theories of mind; consciousness and the senses; personal identity; the philosophy of psychopathology and dreams, emotion and temporality. Essential reading for all students of philosophy of mind, science and psychology, The Routledge Companion to Philosophy of Psychology will also be of interest to anyone studying psychology and its related disciplines.

Lessons in Teaching Computing in Primary Schools

Download Lessons in Teaching Computing in Primary Schools PDF Online Free

Author :
Publisher : Learning Matters
ISBN 13 : 1473905281
Total Pages : 161 pages
Book Rating : 4.4/5 (739 download)

DOWNLOAD NOW!


Book Synopsis Lessons in Teaching Computing in Primary Schools by : James Bird

Download or read book Lessons in Teaching Computing in Primary Schools written by James Bird and published by Learning Matters. This book was released on 2014-07-18 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lesson planning in line with the new Primary National Curriculum! This book goes much further than explaining to teachers the knowledge that the new computing curriculum requires. It is about teaching and learning, rather than simply teaching computing as an academic subject. The new computing curriculum is explored in manageable chunks and there is no "scary" language; everything is explained clearly and accessibly. You will find example lesson plans alongside every element of the curriculum as support and inspiration when planning your own lessons. It inspires an approach to teaching computing that is about creativity and encouraging learners to respond to challenges and problems using technology as a tool. Ideas for taking the lesson further, assessment and reflective questions for you are also included after each lesson. Did you know that this book is part of the Lessons in Teaching series? Table of Contents Algorithms and computational thinking in Key Stage 1/ Programming in KS1 / Manipulating digital data in KS1 / Programming in KS2 / Physical Computing in KS2 / Understanding computer networks in KS2 / Searching wisely for digital information in KS2 (Adam Scribbans) / Using technology purposefully in KS2 / Extending computing to meet individual needs in KS2 (Sway Grantham and Alison Witts) / Embedding computational thinking: moving from graphical to text-based languages (Mark Dorling) WHAT IS THE LESSONS IN TEACHING SERIES? Suitable for any teacher at any stage of their career, the books in this series are packed with great ideas for teaching engaging, outstanding lessons in your primary classroom. The Companion Website accompanying the series includes extra resources including tips, lesson starters, videos and Pinterest boards. Visit ww.sagepub.co.uk/lessonsinteaching Books in this series: Lessons in Teaching Grammar in Primary Schools, Lessons in Teaching Computing in Primary Schools, Lessons in Teaching Number and Place Value in Primary Schools, Lessons in Teaching Reading Comprehension in Primary Schools, Lesson in Teaching Phonics in Primary Schools

The Blackwell Guide to the Philosophy of Computing and Information

Download The Blackwell Guide to the Philosophy of Computing and Information PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470756764
Total Pages : 392 pages
Book Rating : 4.4/5 (77 download)

DOWNLOAD NOW!


Book Synopsis The Blackwell Guide to the Philosophy of Computing and Information by : Luciano Floridi

Download or read book The Blackwell Guide to the Philosophy of Computing and Information written by Luciano Floridi and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Guide provides an ambitious state-of-the-art survey of the fundamental themes, problems, arguments and theories constituting the philosophy of computing. A complete guide to the philosophy of computing and information. Comprises 26 newly-written chapters by leading international experts. Provides a complete, critical introduction to the field. Each chapter combines careful scholarship with an engaging writing style. Includes an exhaustive glossary of technical terms. Ideal as a course text, but also of interest to researchers and general readers.

Laws, Mind, and Free Will

Download Laws, Mind, and Free Will PDF Online Free

Author :
Publisher : MIT Press
ISBN 13 : 0262294796
Total Pages : 292 pages
Book Rating : 4.2/5 (622 download)

DOWNLOAD NOW!


Book Synopsis Laws, Mind, and Free Will by : Steven Horst

Download or read book Laws, Mind, and Free Will written by Steven Horst and published by MIT Press. This book was released on 2011-03-11 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: An account of scientific laws that vindicates the status of psychological laws and shows natural laws to be compatible with free will. In Laws, Mind, and Free Will, Steven Horst addresses the apparent dissonance between the picture of the natural world that arises from the sciences and our understanding of ourselves as agents who think and act. If the mind and the world are entirely governed by natural laws, there seems to be no room left for free will to operate. Moreover, although the laws of physical science are clear and verifiable, the sciences of the mind seem to yield only rough generalizations rather than universal laws of nature. Horst argues that these two familiar problems in philosophy—the apparent tension between free will and natural law and the absence of "strict" laws in the sciences of the mind—are artifacts of a particular philosophical thesis about the nature of laws: that laws make claims about how objects actually behave. Horst argues against this Empiricist orthodoxy and proposes an alternative account of laws—an account rooted in a cognitivist approach to philosophy of science. Horst argues that once we abandon the Empiricist misunderstandings of the nature of laws there is no contrast between "strict" laws and generalizations about the mind ("ceteris paribus" laws, laws hedged by the caveat "other things being equal"), and that a commitment to laws is compatible with a commitment to the existence of free will. Horst's alternative account, which he calls "cognitive Pluralism," vindicates the truth of psychological laws and resolves the tension between human freedom and the sciences.

Conceptual Atomism and the Computational Theory of Mind

Download Conceptual Atomism and the Computational Theory of Mind PDF Online Free

Author :
Publisher : John Benjamins Publishing
ISBN 13 : 9789027252050
Total Pages : 542 pages
Book Rating : 4.2/5 (52 download)

DOWNLOAD NOW!


Book Synopsis Conceptual Atomism and the Computational Theory of Mind by : John-Michael Kuczynski

Download or read book Conceptual Atomism and the Computational Theory of Mind written by John-Michael Kuczynski and published by John Benjamins Publishing. This book was released on 2007-01-01 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is it to have a concept? What is it to make an inference? What is it to be rational? On the basis of recent developments in semantics, a number of authors have embraced answers to these questions that have radically counterintuitive consequences, for example: • One can rationally accept self-contradictory propositions (e.g. Smith is a composer and Smith is not a composer).• Psychological states are causally inert: beliefs and desires do nothing. • The mind cannot be understood in terms of folk-psychological concepts (e.g. belief, desire, intention). • One can have a single concept without having any others: an otherwise conceptless creature could grasp the concept of justice or of the number seven. • Thoughts are sentence-tokens, and thought-processes are driven by the syntactic, not the semantic, properties of those tokens. In the first half of Conceptual Atomism and the Computational Theory of Mind, John-Michael Kuczynski argues that these implausible but widely held views are direct consequences of a popular doctrine known as content-externalism, this being the view that the contents of one's mental states are constitutively dependent on facts about the external world. Kuczynski shows that content-externalism involves a failure to distinguish between, on the one hand, what is literally meant by linguistic expressions and, on the other hand, the information that one must work through to compute the literal meanings of such expressions. The second half of the present work concerns the Computational Theory of Mind (CTM). Underlying CTM is an acceptance of conceptual atomism – the view that a creature can have a single concept without having any others – and also an acceptance of the view that concepts are not descriptive (i.e. that one can have a concept of a thing without knowing of any description that is satisfied by that thing). Kuczynski shows that both views are false, one reason being that they presuppose the truth of content-externalism, another being that they are incompatible with the epistemological anti-foundationalism proven correct by Wilfred Sellars and Laurence Bonjour. Kuczynski also shows that CTM involves a misunderstanding of terms such as “computation”, “syntax”, “algorithm” and “formal truth”; and he provides novel analyses of the concepts expressed by these terms. (Series A)

Beyond Reduction

Download Beyond Reduction PDF Online Free

Author :
Publisher : Oxford University Press
ISBN 13 : 0190295589
Total Pages : 240 pages
Book Rating : 4.1/5 (92 download)

DOWNLOAD NOW!


Book Synopsis Beyond Reduction by : Steven Horst

Download or read book Beyond Reduction written by Steven Horst and published by Oxford University Press. This book was released on 2007-08-30 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contemporary philosophers of mind tend to assume that the world of nature can be reduced to basic physics. Yet there are features of the mind consciousness, intentionality, normativity that do not seem to be reducible to physics or neuroscience. This explanatory gap between mind and brain has thus been a major cause of concern in recent philosophy of mind. Reductionists hold that, despite all appearances, the mind can be reduced to the brain. Eliminativists hold that it cannot, and that this implies that there is something illegitimate about the mentalistic vocabulary. Dualists hold that the mental is irreducible, and that this implies either a substance or a property dualism. Mysterian non-reductive physicalists hold that the mind is uniquely irreducible, perhaps due to some limitation of our self-understanding. In this book, Steven Horst argues that this whole conversation is based on assumptions left over from an outdated philosophy of science. While reductionism was part of the philosophical orthodoxy fifty years ago, it has been decisively rejected by philosophers of science over the past thirty years, and for good reason. True reductions are in fact exceedingly rare in the sciences, and the conviction that they were there to be found was an artifact of armchair assumptions of 17th century Rationalists and 20th century Logical Empiricists. The explanatory gaps between mind and brain are far from unique. In fact, in the sciences it is gaps all the way down.And if reductions are rare in even the physical sciences, there is little reason to expect them in the case of psychology. Horst argues that this calls for a complete re-thinking of the contemporary problematic in philosophy of mind. Reductionism, dualism, eliminativism and non-reductive materialism are each severely compromised by post-reductionist philosophy of science, and philosophy of mind is in need of a new paradigm. Horst suggests that such a paradigm might be found in Cognitive Pluralism: the view that human cognitive architecture constrains us to understand the world through a plurality of partial, idealized, and pragmatically-constrained models, each employing a particular representational system optimized for its own problem domain. Such an architecture can explain the disunities of knowledge, and is plausible on evolutionary grounds.