This chapter contains sections titled: Introduction A Brief History of Developmental Explanations of Phenotypic Evolution Research Questions of Evo‐Devo Unifying Themes of the Conceptual Basis of Evo‐Devo Conclusion: A Mechanistic Theory of Evo‐Devo Challenges the Modern Synthesis Postscript: Counterpoint References.

In this paper we argue that an operational organism concept can help to overcome the structural deficiency of mathematical models in biology. In our opinion, the structural deficiency of mathematical models lies mainly in our inability to identify functionally relevant biological characters in biological systems, and not so much in a lack of adequate mathematical representations of biological processes. We argue that the problem of character identification in biological systems is linked to the question of a properly formulated organism concept. (...) Lastly, we demonstrate how a decomposition of an organism into independent characters in the context of a specific biological process--such as adaptation by means of natural selection--depends on the dynamical properties and invariance conditions of the equations that describe this process. (shrink)

Equational intensional ‘reconstruction’ relatives. Submitted.

The following contribution1 was inspired by Cleo Condoravdi’s article on NPI licensing in temporal clauses (Condoravdi, this volume). Condoravdi gives a coherent and comprehensive account of be- fore which crucially involves coercion of propositions to the earliest or maximal times at which the propositions are true, and a modal component for non-factual interpretations. I argue for a nonmodal, non-coercive analysis of clauses like [A before B] as ‘A is the case when B has not been the case’, triggering a conversational (...) implicature that B will be the case later. I will discuss temporal operators involving measure phrases, like three hours before, and I will show that so-called “expletive” negation in corresponding clauses in German is, in fact, interpreted as negation. (shrink)

This talk is based on Krifka (2001). Its topic is the interpretation of quantifiers in questions. I will use English data for illustration, but the phenomena to be discussed appear to be general enough to be relevant for other languages as well, at least those languages that have nominal quantifiers.

This book represents an effort to understand very old questions about biological form, function, and the relationships between them. The essays collected here reflect the diversity of approaches in evolutionary developmental biology, including not only studies by prominent scientists whose research focuses on topics concerned with evolution and development, but also historically and conceptually oriented studies that place the scientific work within a larger framework and ask how it can be pushed further. Topics under discussion range from the use of (...) theoretical and empirical biomechanics to understand the evolution of plant form, to detailed studies of the evolution of development and the role of developmental constraints on phenotypic variation. The result is a rich and interdisciplinary volume that will begin a wider conversation about the shape of Evo Devo as it matures as a field. (shrink)

While language is presumably unique to humans, there are possible pre-linguistic features that developed in the course of human evolution which predate features of language, and might have even been essential for its evolution. A number of such possible preadaptations for human language have been discussed, like the permanent lowering of the larynx, the ability to control one’s breath, or the inclination of humans to imitate. In this paper I would like to point out another candidate for a preadaptation, namely (...) the functional differentiation of the hands and the way in which they cooperate in manual actions. (shrink)

This paper develops a way to model performative speech acts within a framework of dynamic semantics. It introduces a distinction between performative and informative updates, where informative updates filter out indices of context sets (cf. Stalnaker, Cole (ed), Pragmatics, Academic Press, 1978), whereas performative updates change their indices (cf. Szabolcsi, Kiefer (ed), Hungarian linguistics, John Benjamins, 1982). The notion of index change is investigated in detail, identifying implementations by a function or by a relation. Declarations like _the meeting is (hereby) (...) adjourned_ are purely performative updates that just enforce an index change on a context set. Assertions like _the meeting is (already) adjourned_ are analyzed as combinations of a performative update that introduces a guarantee of the speaker for the truth of the proposition, and an informative update that restricts the context set so that this proposition is true. The first update is the illocutionary act characteristic for assertions; the second is the primary perlocutionary act, and is up for negotiations with the addressee. Several other speech acts will be discussed, in particular commissives, directives, exclamatives, optatives, and definitions, which are all performative, and differ from related assertions. The paper concludes a discussion of locutionary acts, which are modelled as index changers as well, and proposes a novel analysis for the performative marker _hereby._. (shrink)

Even though it is not very often admitted, partial functions do play a significant role in many practical applications of deduction systems. Kleene has already given a semantic account of partial functions using three-valued logic decades ago, but there has not been a satisfactory mechanization. Recent years have seen a thorough investigation of the framework of many-valued truth-functional logics. However, strong Kleene logic, where quantification is restricted and therefore not truthfunctional, does not fit the framework directly. We solve this problem (...) by applying recent methods from sorted logics. This paper presents a resolution calculus that combines the proper treatment of partial functions with the efficiency of sorted calculi. (shrink)

Caenorhabditis elegans is a tiny worm that has become the focus of a large number of worldwide research projects examining its genetics, development, neuroscience, and behavior. Recently several groups of investigators have begun to tie together the behavior of the organism and the underlying genes, neural circuits, and molecular processes implemented in those circuits. Behavior is quintessentially organismal—it is the organism as a whole that moves and mates—but the explanations are devised at the molecular and neurocircuit levels, and tested in (...) populations using protocols that span many levels of aggregation. Following a brief review of the main relevant features of C. elegans, I describe some of these circuits, and then discuss two contrasting approaches in behavioral genetics and neural network analysis of the worm. Finally, I outline the rudiments of a “field and focus” explanation model using the two contrasting approaches. (shrink)

Biology lacks a central organism concept that unambiguously marks the distinction between organism and non-organism because the most important questions about organisms do not depend on this concept. I argue that the two main ways to discover useful biological generalizations about multicellular organization—the study of homology within multicellular lineages and of convergent evolution across lineages in which multicellularity has been independently established—do not require what would have to be a stipulative sharpening of an organism concept.

Dans la continuité des travaux qu’elle a consacrés à la divination et à la théurgie dans le néoplatonisme antique, Crystal Addey publie un ouvrage collectif qui s’intéresse à un aspect trop souvent négligé des pratiques divinatoires antiques, leur rapport au(x) savoir(s) et à la rationalité. Les dix contributions qui composent le livre se concentrent principalement sur des sources philosophiques (Platon, Xénophon, Cicéron, Plutarque, Apulée), théologiques (les Pères de l’Église) et mystiques...

Im Rahmen einer Erörterung der Philosophie J.G. Fichtes liegt die wissenschaftliche Bedeutung J.B. Schads nicht darin, daß dieser besonders scharfsinnig interpretierend oder kommentierend an die Wissenschaftslehre herangegangen sei. Das weist er selbst ausdrücklich von sich. Vielmehr kann die philosophische Leistung Schads, die es rechtfertigt, auf einem Fichte-Kongreß auch auf ihn näher einzugehen, darin gesehen werden, daß er als erster den Versuch macht, die Philosophie Fichtes nicht nur allgemeinverständlich darzustellen, sondern sie auch relativ frei aus sich selbst heraus nachzuentwickeln.

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