What is a larva, if it is not what survives of an ancestor's adult, compressed into a transient pre‐reproductive phase, as suggested by Haeckel's largely disreputed model of evolution by recapitulation? A recently published article hypothesizes that larva and adult of holometabolous insects are developmental expressions of two different genomes coexisting in the same animal as a result of an ancient hybridization event between an onychophoran and a primitive insect with eventless post‐embryonic development. More likely, however, larvae originated from (...) late embryonic or early post‐embryonic stages of ancestors with direct development. Evolutionary novelties would thus be intercalary rather than terminal, with respect to the ancestor's ontogenetic schedule. This scenario, supported by current research on holometabolous insects and marine invertebrates with complex life cycles, offers a serious alternative to the traditional scenario (‘what is early in ontogeny is also early in phylogeny’) underlying the current perception of the evolution of genetic regulatory networks. (shrink)

Comprehending the origin of marine invertebrate larvae remains a key domain of research for evolutionary biologists, including the repeated origin of direct developmental modes in echinoids. In order to address the latter question, we surveyed existing evidence on relationships of homology between the ectoderm territories of two closely related sea urchin species in the genus Heliocidaris that differ in their developmental mode. Additionally, we explored a recently articulated idea about homology called ‘organizational homology’ (Muller 2003. In: Muller (...) GB, Newman SA, editors. Origination of organismal form: beyond the gene in developmental and evolutionary biology. Cambridge, MA: A Bradford Book, The MIT Press. p 51–69. ) in the context of this specific empirical case study. Applying the perspective of organizational homology to our experimental system of congeneric echinoids has led us to a new hypothesis concerning the ectoderm evolution in these species. The extravestibular ectoderm of the direct developer Heliocidaris erythrogramma is a novel developmental territory that arose as a fusion of the oral and aboral ectoderm territories found in indirect developing echinoids such as Heliocidaris tuberculata. This hypothesis instantiates a theoretical principle concerning the origin of developmental modules, ‘integration’, which has been neglected because the opposite theoretical principle, ‘parcellation’, is more readily observable in events such as gene duplication and divergence (Wagner 1996. Am Zool 36:36–43). J. Exp. Zool. (Mol. Dev. Evol.) 306B:18– 34, 2006. (shrink)

For over a century, Haeckel's Gastraea theory remained a dominant theory to explain the origin of multicellular animals. According to this theory, the animal ancestor was a blastula‐like colony of uniform cells that gradually evolved cell differentiation. Today, however, genes that typically control metazoan development, cell differentiation, cell‐to‐cell adhesion, and cell‐to‐matrix adhesion are found in various unicellular relatives of the Metazoa, which suggests the origin of the genetic programs of cell differentiation and adhesion in the root of the (...) Opisthokonta. Multicellular stages occurring in the complex life cycles of opisthokont protists (mesomycetozoeans and choanoflagellates) never resemble a blastula. Here, we discuss a more realistic scenario of transition to multicellularity through integration of pre‐existing transient cell types into the body of an early metazoon, which possessed a complex life cycle with a differentiated sedentary filter‐feeding trophic stage and a non‐feeding blastula‐like larva, the synzoospore. Choanoflagellates are considered as forms with secondarily simplified life cycles. (shrink)

The origin of marine invertebrate larvae has been an area of controversy in developmental evolution for over a century. Here, we address the question of whether a pelagic “larval” or benthic “adult” morphology originated first in metazoan lineages by testing the hypothesis that particular gene co-option patterns will be associated with the origin of feeding, indirect developing larval forms. Empirical evidence bearing on this hypothesis is derivable from gene expression studies of the sea urchin larval gut of (...) two closely related but differently developing congenerics, Heliocidaris tuberculata (feeding indirect-developing larva) and H. erythrogramma (nonfeeding direct developer), given two subsidiary hypotheses. (1) If larval gut gene expression in H. tuberculata was co-opted from an ancestral adult expression pattern, then the gut expression pattern will remain in adult H. erythrogramma despite its direct development. (2) Genes expressed in the larval gut of H. tuberculata will not have a coordinated expression pattern in H. erythrogramma larvae due to loss of a functional gut. Five structural genes expressed in the invaginating archenteron of H. tuberculata during gastrulation exhibit substantially different expression patterns in H. erythrogramma with only one remaining endoderm specific. Expression of these genes in the adult of H. erythrogramma and larval gut of H. tuberculata, but not in H. erythrogramma larval endoderm, supports the hypothesis that they first played roles in the formation of adult structures and were subsequently recruited into larval ontogeny during the origin and evolution of feeding planktotrophic deuterostome larvae. (shrink)

In September of 1869, while studying sponges off the Norwegian island of Gisoe, Ernst Haeckel (1834-1919) discovered a tiny, flagellated ball-shaped organism swimming about in his samples. Appearing first to be the planula larva of an invertebrate marine animal further observation revealed it to be a colony of flagellated cells with a complex life cycle transitioning between multicellular and single-cell stages and several distinct forms of protozoa. Haeckel named it Magosphaera planula (the "magician's ball") and it eventually assumed a central (...) role in his theories of animal evolution, appearing as the modern exemplar of the blastaea stage in his gastraea theory of metazoan evolution. Throughout the latter half of the nineteenth century and into the twentieth it was an object of considerable scientific interest, and yet it was only ever observed by Haeckel himself and then only the once. Eventually it faded altogether from scientific discussion. This paper traces the rise and fall of Magosphaera as an important epistemic object in the theories of Haeckel and other biologists, and an attempt is made to identify what exactly the organism (or organisms!) was that Haeckel observed in the fall of 1869. (shrink)

The Origin of the Family, Private Property and the State (1884), was a provocative and profoundly influential critique of the Victorian nuclear family. Engels argued that the traditional monogamous household was in fact a recent construct, closely bound up with capitalist societies. Under this patriarchal system, women were servants and, effectively, prostitutes. Only Communism would herald the dawn of communal living and a new sexual freedom and, in turn, the role of the state would become superfluous.

Familiarity with Charles Darwin's treatise on evolution is essential to every well-educated individual. One of the most important books ever published--and a continuing source of controversy, a century and a half later--this classic of science is reproduced in a facsimile of the critically acclaimed first edition.

Understanding the evolutionary role of environmentally induced phenotypic variation (i.e., plasticity) is an important issue in developmental evolution. A major physiological response to environmental change is cellular stress, which is counteracted by generic stress reactions detoxifying the cell. A model, stress‐induced evolutionary innovation (SIEI), whereby ancestral stress reactions and their corresponding pathways can be transformed into novel structural components of body plans, such as new cell types, is described. Previous findings suggest that the cell differentiation cascade of a cell type (...) critical to pregnancy in humans, the decidual stromal cell, evolved from a cellular stress reaction. It is hypothesized that the stress reaction in these cells was elicited ancestrally via inflammation caused by embryo attachment. The present study proposes that SIEI is a distinct form of plasticity‐based evolutionary change leading to the origin of novel structures rather than adaptive transformation of pre‐existing characters. (shrink)

We propose that to understand the biological and neurophysiological processes that give rise to human mental phenomena it is necessary to consider them as behavioral relational phenomena. In particular, we propose that: a) these phenomena take place in the relational manner of living that human language constitutes, and b) that they arise as recursive operations in such behavioral domain. Accordingly, we maintain that these phenomena do not take place in the brain, nor are they the result of a unique operation (...) of a human brain, but arise with the participation of the brain as it generates the behavioral relational dynamics that constitutes language. (shrink)

In this paper, we aim to trace the origin of the systematic cross-cultural variations in referential intuitions by investigating the effects of perspective taking on people’s responses in the Gödel-style probes through two novel experiments. Here is how we will proceed. In section 2, we first briefly introduce the MMNS (2004) study, and then critically review the two relevant studies conducted by Sytsma and colleagues (i.e., Sytsma and Livengood 2011; Sytsma et al. 2015). In section 3, we introduce the (...) literature on cross-cultural variation in perspective taking in cultural psychology, which together with the conjecture of perspectival ambiguity leads to the hypothesis of our current study. In sections 4 and 5, two new experiments on how perspective taking affects people’s responses in hypothetical stories modelled on the Gödel thought experiment will be reported. Based on the empirical findings, in section 6 we argue that the robust cross-cultural variations thus far observed in people’s responses to the Gödel cases are largely attributable to culturally specific perspective-taking strategies, which provides new support for the proposal previously made by Sytsma and Livengood (2011). The implications of the experimental results for the ongoing work of testing the theories of refence of names and for the current metaphilosophical debate on the robustness of philosopher’s intuitions are also drawn in this section. Finally, the major conclusions and contributions of the current study are highlighted in section 7. (shrink)

Beyond the world, i.e. beyond the collection of finite things, there is some one being who rules, not only as the soul is the ruler in me (or, to put it better, as the self is the ruler in my body), but also in a much higher way. For the one being who rules the universe doesn’t just •govern the world but also •builds or makes it. He is above the world and outside it, so to speak, and therefore he (...) is the ultimate reason for things. ·That follows because •he is the only extramundane thing, i.e. the only thing that exists out of the world; and •nothing in the world could be the ultimate reason for things. I now explain that second premise·. We can’t find in any individual thing, or even in the entire collection and series of things, a sufficient reason why they exist. Suppose that a book on the elements of geometry has always existed, each copy made from an earlier one, ·with no first copy·. We can.. (shrink)

Thomas Sebeok and Noam Chomsky are the acknowledged founding fathers of two research fields which are known respectively as Biosemiotics and Biolinguistics and which have been developed in parallel during the past 50 years. Both fields claim that language has biological roots and must be studied as a natural phenomenon, thus bringing to an end the old divide between nature and culture. In addition to this common goal, there are many other important similarities between them. Their definitions of language, for (...) example, have much in common, despite the use of different terminologies. They both regard language as a faculty, or a modelling system, that appeared rapidly in the history of life and probably evolved as an exaptation from previous animal systems. Both accept that the fundamental characteristic of language is recursion, the ability to generate an unlimited number of structures from a finite set of elements (the property of ‘discrete infinity’). Both accept that human beings are born with a predisposition to acquire language in a few years and without apparent efforts (the innate component of language). In addition to similarities, however, there are also substantial differences between the two fields, and it is an historical fact that Sebeok and Chomsky made no attempt at resolving them. Biosemiotics and Biolinguistics have become two separate disciplines, and yet in the case of language they are studying the same phenomenon, so it should be possible to bring them together. Here it is shown that this is indeed the case. A convergence of the two fields does require a few basic readjustments in each of them, but leads to a unified framework that keeps the best of both disciplines and is in agreement with the experimental evidence. What is particularly important is that such a framework suggests immediately a new approach to the origin of language. More precisely, it suggests that the brain wiring processes that take place in all phases of human ontogenesis (embryonic, foetal, infant and child development) are based on organic codes, and it is the step-by-step appearance of these brain-wiring codes, in a condition that is referred to as cerebra bifida, that holds the key to the origin of language. (shrink)

Teachers’ conceptions about the origin of life in three Latin American countries with contrasting levels of secularism were analyzed: Argentina, Brazil, and Uruguay. A European survey questionnaire was used and the interpretation of the results drew on Barbour's four categories concerning the relationships of science and religion. A large majority of Argentinian and Uruguayan teachers were clearly evolutionist, even when believing in God, with no difference between Argentina and Uruguay. The majority of Brazilian teachers assumed a religious position about (...) the origin of life, being creationist or evolutionary creationist. Differences of Brazilian teachers’ conceptions may result from the higher percentage of evangelicals and lower proportion of agnostics/atheists. Brazilian Catholic teachers were more creationist than their Catholic colleagues in Argentina and Uruguay. Distinct patterns were found, but further research is needed to understand possible classroom impacts. (shrink)

It is at this juncture that post-modernism in the science field lacks that remaining piece of discipline, accepting the existence of an absolute, inner fabric of creative intelligence that is responsible for the vibratory formation of all physical world phenomena. It is for this reason that science alone will not find a viable answer of how the universe was created. Thus far, the science hierarchy has supplied us with theories that are totally incompatible with the belief that the universe had (...) an origin connected to a creative force. Their contradictions come as a result of their atheistic/agnostic beliefs. It is the time in our evolution to make a changing of the guard. We need a new paradigm, a practical application that people can make sense of and find valuable in their daily lives. (shrink)

Origin of life on earth transpired once and from then on, it emerges as an endless eternal process. Matter and energy are constants of the cosmos and the hypothesis is that the origin of life is a moment when these constants intertwined or interacted. Energy from the cosmos interacted with inorganic matter to support matter with retention of this riveted energy, as energy to be circulated within the primitive channelized structures to conserve energy by the materialization of the (...) proton homeostasis mechanisms developed from the obtainable inorganic matter. The driver for these processes as we now confirm, exists in the quantum world and through quantum phenomenal processes could have combined these constants to create the magic of life. Primitive earth was a chemical reactive system that triggered a macromolecular evolution by means of open thermodynamic systems, driven by cyclic gradients of temperature, electromagnetic radiation and chemical potentials which sustained life and proto-consciousness in the first life forms driven by the quantum processes. The origin of life is always an intriguing topic but the purpose for finding the cause should never be inclined towards obliterating it; for if that is the case, the further we seek, the farther it will go. (shrink)

On the Origin of Objects is the culmination of Brian Cantwell Smith's decade-long investigation into the philosophical and metaphysical foundations of computation, artificial intelligence, and cognitive science. Based on a sustained critique of the formal tradition that underlies the reigning views, he presents an argument for an embedded, participatory, "irreductionist," metaphysical alternative. Smith seeks nothing less than to revise our understanding not only of the machines we build but also of the world with which they interact. Smith's ambitious project (...) begins as a search for a comprehensive theory of computation, able to do empirical justice to practice and conceptual justice to the computational theory of mind. A rigorous commitment to these two criteria ultimately leads him to recommend a radical overhaul of our traditional conception of metaphysics. Everything that exists - objects, properties, life, practice - lies Smith claims in the "middle distance," an intermediate realm of partial engagement with and partial separation from, the enveloping world. Patterns of separation and engagement are taken to underlie a single notion unifying representation and ontology: that of subjects' "registration" of the world around them. Along the way, Smith offers many fascinating ideas: the distinction between particularity and individuality, the methodological notion of an "inscription error," an argument that there are no individualswithin physics, various deconstructions of the type-instance distinction, an analysis of formality as overly disconnected ("discreteness run amok"), a conception of the boundaries of objects as properties of unruly interactions between objects and subjects, an argument for the theoretical centrality of reference preservation, and a theatrical, acrobatic metaphor for the contortions involved in the preservation of reference and resultant stabilization of objects. Sidebars and diagrams throughout the book help clarify and guide Smith's highly original and compelling argument. A Bradford Book. (shrink)

The development of Christian thought on Heidegger can not be ignored. Heidegger was born in a conservative Catholic family, he entered college was originally a theological student. Even after he was formally separated from the Catholic system, he also regarded as a Christian theologian since. Until 1935, he was also born in the beliefs of his distress. This paper will focus on "Being and Time," presented by the theme of Christianity, Christianity is still trying to point out many of his (...) early ideas the source of important concepts. The influence of Christianity on the intellectual development of Heidegger can hardly be exaggerated. Heidegger was born in a conservative Catholic family. He first entered university as a student of theology. Even after his formal break with the system of Catholicism, he still considered himself a Christian theologian, and as late as 1935, he still had to struggle with the faith of his birth. The theme of this treatise is the Christian influence on Heidegger as it is displayed in Being and Time. It aims at showing that many important concepts in this opus magnum of Heidegger have their origin in Christian thought. (shrink)

A Letter to the Editor about the origin of "gender identity" and deficiencies in its current definition.

We usually think about language and pain as opposites, the one being about expression and connection, the other destructive, "beyond words" so to speak, and isolating. Language Pangs challenges these familiar conceptions and offers a radical reconsideration of the relationship between pain and language in terms of an essential interconnectedness. Ilit Ferber's premise is that we cannot probe the experience of pain without taking account its inherent relation to language; and vice versa, that our understanding of the nature of language (...) essentially depends on how we take account of its correspondence with pain. Language Pangs brings together discussions of philosophical as well as literary texts, an intersection that is especially productive in considering the phenomenology of pain and its bearing on language. Ferber explores a phenomenology of pain and its relation to language, before providing a unique close reading of Johann Gottfried Herder's Treatise on the Origin of Language, the first modern philosophical text to consider language and pain, establishing the cry of pain as the origin of language. Herder also raises important claims regarding the relationship between human and animal, questions of sympathy and the role of hearing in the expression of pain. Beyond Herder, the book grapples with the work of other profound thinkers, including Martin Heidegger, Stanley Cavell, and André Gide, and finally, Sophocles, from them weaving new insights on the experience of pain, expression, sympathy, and hearing. (shrink)

The impact of the Meditations on the Life of Christ, a treatise originally written for the spiritual instruction of Clares in the Tuscan town of S. Gimignano, on the course of later medieval Western Christianity can hardly be overestimated. Originally written either in Latin or Italian, as I prefer to believe, once it had appeared the treatise spread like wildfire through Europe, translated into many languages and evolving into different versions of varying length and content. In surveying how the search (...) regarding its origin has fared in recent years it is evident that there exists a sharp difference in opinion on the part of art historians on the one hand and contemporary scholars who deal with medieval... (shrink)

The paper delves into the nature and origin of ideas, words, meanings, and language from the perspective of Indian mystics and philosophers Abhinavagupta and Sri Aurobindo. We begin with the Eastern viewpoint, commencing with the Vedic interpretation, in which the origin of all speech lies in the transcendent sound, known as the ‘Word’. Abhinavagupta delineates the genesis of words as a four-level process within consciousness, where mystic sounds gradually acquire concreteness in the form of human language. Sri Aurobindo (...) extends this insight by recognizing that all words stem from mind-impressions elicited by seed-sounds bearing psychological qualities. Moreover, according to Sri Aurobindo, the universe and its natural phenomena represent the expression of a creative transcendental Real-Idea, which serves as the foundation for all meanings, signs, words, and human language and Nature itself. Language, therefore, becomes an instrument for the expression of divine consciousness in manifestation. This comprehensive perspective transcends the confines of language philosophy, expanding into a universal spiritual outlook. Finally, it is shown how the integration of Western and Eastern philosophies reconciles many apparent inconsistencies within modern philosophy and science (especially in the philosophy of language, cognitive sciences, neuroscience, and AI.) This integral perspective surpasses a naturalistic viewpoint, providing a synthetic framework that unifies the diverse East-West philosophical positions. (shrink)

What would a Grand Unified Theory of big-scale evolution look like? Here is one answer. It would unify the various trends that have been documented and suspected, the features of life that have been said to increase over its history—body size, fitness, intelligence, versatility, evolvability, energy intensiveness, energy rate density, and complexity-in-the-sense-of-part-types, and complexity-in-the-sense-of-hierarchy. It would show us how these putative trends are related to each other, how they are all the product of some single simple principle or some small (...) set of principles. It would identify and connect all of the variables that are expected to increase over the long haul in evolution, perhaps in a single equation, or if not yet quantifiable, perhaps in a single breath.The obvious unifying candidate is fitness. Natural selection acts to adapt organisms to local circumstances, of course, but it might also act over the long term to produce adaptation on a bigger scale, to produce or .. (shrink)

This article positions relational social theories against theories of non-relation. Relational social theories consider relations to be primary as opposed to objects. In contrast, two theoretical positions—psychoanalysis and Marxism—hold non-relation as the origin of any social relations. Not coincidentally, psychoanalysis and Marxism also hold the position of the subject, which relational social theories abolish as yet another object. What makes the link between non-relation and subject possible for psychoanalysis and Marxism, is the affirmation of a constitutive negativity embodied in-and-through (...) social antagonisms of sexuality and class-struggle. The article shows, therefore, that by precluding this constitutive negativity, relational social theories lose sight of these two critical sites. (shrink)

The theology of John Calvin has deeply affected the American mentality through two streams of thought, Puritanism and Jansenism. These traditions formulate moral problems in terms of absolute, clear principles and avoid casuistic analysis of moral problems. This approach is designated American moralism. This article suggests that the bioethics movement in the United States was stimulated by the moralistic mentality but that the work of the bioethics has departed from this viewpoint. Keywords: bioethics, Calvinism, casuistry, Jansenism, moralism, moral principle, Puritanism (...) CiteULike Connotea Del.icio.us What's this? (shrink)

Numerous scenarios explain the origin of the eukaryote cell by fusion or endosymbiosis between an archaeon and a bacterium (and sometimes a third partner). We evaluate these hypotheses using the following three criteria. Can the data be explained by the null hypothesis that new features arise sequentially along a stem lineage? Second, hypotheses involving an archaeon and a bacterium should undergo standard phylogenetic tests of gene distribution. Third, accounting for past events by processes observed in modern cells is preferable (...) to postulating unknown processes that have never been observed. For example, there are many eukaryote examples of bacteria as endosymbionts or endoparasites, but none known in archaea. Strictly post‐hoc hypotheses that ignore this third criterion should be avoided. Applying these three criteria significantly narrows the number of plausible hypotheses. Given current knowledge, our conclusion is that the eukaryote lineage must have diverged from an ancestor of archaea well prior to the origin of the mitochondrion. Significantly, the absence of ancestrally amitochondriate eukaryotes (archezoa) among extant eukaryotes is neither evidence for an archaeal host for the ancestor of mitochondria, nor evidence against a eukaryotic host. BioEssays 29: 74–84, 2007. © 2006 Wiley Periodicals, Inc. (shrink)

We develop a geometro-dynamical approach to the cosmological constant problem (CCP) by invoking a geometry induced by the energy-momentum tensor of vacuum, matter and radiation. The construction, which utilizes the dual role of the metric tensor that it structures both the spacetime manifold and energy-momentum tensor of the vacuum, gives rise to a framework in which the vacuum energy induced by matter and radiation, instead of gravitating, facilitates the generation of the gravitational constant. The non-vacuum sources comprising matter and radiation (...) gravitate normally. At the level of classical gravitation, the mechanism deadens the CCP yet quantum gravitational effects, if strong, can keep it existent. (shrink)

Wittgenstein in his later writing often remarked on the negative influence of language on philosophy. Here, I call attention to a previously unnoticed but significant way that language has influenced philosophy: we use the very same vocabulary in two different ways, in philosophical talk and in our everyday interactive speaking-situations. Our propensity for using this double talk has prevented us from resolving most philosophical problems. Is our attraction to philosophical talk the result of our learning to use a phonetic alphabet, (...) so that words can be used outside of interactive situations? (shrink)

SummaryThe approaches to the possibility of theology as science are divided roughly into three types: first, the internalist approach which rejects any attempt to verify the objective validity of revelation under the general concept of science. Second, the externalist approach which demands the verification of objective validity of revelatory truth. Third, the inclusivist approach which seeks the scientificity of theology from a hermeneutic perspective. Outlining the crucial points and limits of these approaches and replacing the question about theology as science (...) with a theological reexamination of the possibility of science in general, this paper tries to suggest an alternative approach by establishing the possibility of scientific knowledge in general from the trinitarian perspective. Under this reformulation of the question, the philosophy of science set forth by Fichte as the most rigorous model of theory of science is critically explored. In conclusion, it is argued that the ultimate ground of all human knowledge and science consists in the eternal divine love and trust in it. (shrink)

According to Descartes, the use of free will is a key way to avoid the errors that arise from the will's attempts to outrun the intellect. The main cause of errors is the combination of infinite will and limited intelligence in man. This combination allows a person to avoid defining the error as an accident and, at the same time, attributing to it the "evil intentions" of God. The author emphasizes that Descartes considers error not only as an epistemological phenomenon, (...) but also as an ontological reality rooted in man. This approach leads to the recognition of error as the basis for distinguishing man as a unique existence that interacts with God and being through a specific relationship to error. (shrink)

This paper will discuss the origin of the human mind, and the qualitative discontinuity between human and animal cognition. We locate the source of this discontinuity within the language faculty, and thus take the origin of the mind to depend on the origin of the language faculty. We will look at one such proposal put forward by Hauser et al. (Science 298:1569-1579, 2002), which takes the evolution of a Merge trait (recursion) to solely explain the differences between (...) human and animal cognition. We argue that the Merge-only hypothesis fails to account for various aspects of the human mind. Instead we propose that the process of lexicalisation is also unique to humans, and that this process is key to explaining the vast qualitative differences. We will argue that lexicalisation is a process through which concepts are reformatted to be able to take on semantic features and to take part in grammatical relations. These are both necessary conditions for a grammatical mind and the increased ability to express conceptual content. We therefore propose a possible explanans for the discontinuity between humans and animals, namely that merge with lexicalisation (and consequently semantic features and grammatical relations) is a minimal requirement for the human mind. (shrink)

A critically acute summary of the main theories about the 'State', from Greek antiquity to the present. The authors highlight the importance of archaeology to our knowledge of how the first States were formed and how they functioned. They also ask what conditions of social production led to the State arising as the self-interested regulator of social relationships.

A theory of conceptual development must specify the innate representational primitives, must characterize the ways in which the initial state differs from the adult state, and must characterize the processes through which one is transformed into the other. The Origin of Concepts (henceforth TOOC) defends three theses. With respect to the initial state, the innate stock of primitives is not limited to sensory, perceptual, or sensorimotor representations; rather, there are also innate conceptual representations. With respect to developmental change, conceptual (...) development consists of episodes of qualitative change, resulting in systems of representation that are more powerful than, and sometimes incommensurable with, those from which they are built. With respect to a learning mechanism that achieves conceptual discontinuity, I offer Quinian bootstrapping. TOOC concludes with a discussion of how an understanding of conceptual development constrains a theory of concepts. (shrink)