Towards a Research Agenda for Informal Logic and Critical Thinking.

Using Carnap’s concept explication, we propose a theory of concept formation in mathematics. This theory is then applied to the problem of how to understand the relation between the concepts formal proof and informal, mathematical proof.

Accounts of the evolutionary past have as much in common with works of narrative history as they do with works of science. Awareness of the narrative character of evolutionary writing leads to the discovery of a host of fascinating and hitherto unrecognized problems in the representation of evolutionary history, problems associated with the writing of narrative. These problems include selective attention, narrative perspective, foregrounding and backgrounding, differential resolution, and the establishment of a canon of important events. The narrative aspects of (...) evolutionary writing, however, which promote linearity and cohesiveness in conventional stories, conflict with the underlying chronicle of evolution, which is not linear, but branched, and which does not cohere, but diverges. The impulse to narrate is so great, however, and is so strongly reinforced by traditional schemes of taxonomic attention, that natural historians have more often abandoned the diverging tree than they have abandoned the narrative mode of representation. If we are to understand the true nature of the evolutionary past then we must adopt tree thinking, and develop new and creative ways, both narrative and non-narrative, of telling the history of life. (shrink)

I Ville verdier oppfordrer Sigurd Hverven til å anerkjenne at planter, dyr, arter og naturområder på jorda i løpet av naturhistorien har oppnådd et mylder av verdier. I senere tid har mennesker fått makten til å ødelegge mange av disse naturverdiene. Det gir oss som lever nå et nytt ansvar for naturen. I boka undersøker Hverven hvordan mennesker kan erkjenne natur, hva natur er og om naturen har verdi i seg selv. Tankegangen munner ut i et historisk forankret imperativ: Tenkning (...) og praksis må innrettes slik at jordas verdifulle evne til å frembringe og opprettholde mangfold ikke skades ytterligere. (shrink)

Perhaps no term in the geological lexicon excites more passions than uniformitarianism, whose motto is “the present is the key to the past.” The term is controversial in part because it contains several meanings, which have been implicated in creating a situation of “semantic chaos” in the geological literature. Yet I argue that debates about uniformitarianism do not arise from a simple chaos of meanings. Instead, they arise from legitimate disagreements about substantive questions. This paper examines these questions and relates (...) them to several “forms of understanding” pursued by researchers in geohistory. (shrink)

Drawing on ideas from philosophy (in particular, epistemology), I argue that one of memory’s most important functions is to provide its owner with knowledge of the physical world. This knowledge helps satisfy the organism’s need to confer stability on an ever-changing reality so the objects in which it consists can be identified and reidentified. I then draw a distinction between sources of knowledge (i.e., from physical vs. subjective reality) and argue—based on evolutionary principles—that because memory was designed by natural selection (...) to interface with the physical world, knowledge acquired via sensory/perceptual experiences should be better remembered than internally generated knowledge made available by introspection. A study conducted to test this hypothesis provides support. I conclude that a serious interdisciplinary approach to issues typically considered the purview of psychology best enables researchers to craft well-specified, theoretically based hypotheses that directly target functions of the mind. (shrink)

Modern standard big bang cosmology was preceded by a 15-year controversy with the rival steady-state theory of the universe. At a time when cosmologically relevant observations were scarce and cosmology was widely regarded as an immature science, or not a science at all, much of the debate took place by means of arguments that were essentially philosophical. Remarkably, professional philosophers, including some of the key figures of Anglo-American philosophy of science, took an active part in the debate; no less remarkably, (...) the involved astronomers and physicists sometimes listened to them. This article reviews the controversy over the steady-state theory as seen from the perspective of contemporary philosophy of science and offers an appraisal of how and to what extent philosophers and scientists entered a dialogue. -/- . (shrink)

In The Uses of Argument, Stephen Toulmin proposed a model for the layout of arguments: claim, data, warrant, qualifier, rebuttal, backing. Since then, Toulmin’s model has been appropriated, adapted and extended by researchers in speech communications, philosophy and artificial intelligence. This book assembles the best contemporary reflection in these fields, extending or challenging Toulmin’s ideas in ways that make fresh contributions to the theory of analysing and evaluating arguments.

In the wake of recent attempts at alternate history (Bowler 2013), this paper suggests several avenues for a pluralistic approach to Charles Darwin and his role in the history of evolutionary theory. We examine in what sense Darwin could be described as a major driver of theoretical change in the history of biology. First, this paper examines how Darwin influenced the future of biological science: not merely by stating the fact of evolution or by bringing evidence for it; but by (...) discovering natural selection, and giving it pre-eminence over any other mechanism for evolution; and also by proposing a masterful and quite unique synthesis of many scientific fields. Contrasting Darwin’s views with those of A.R. Wallace, I conclude that “natural selection” is clearly an original contribution, that it had no forerunners or co-discoverers, and could barely have appeared after Darwin conceived of it. This specificity of Darwin’s contribution is an invitation to be strongly presentist (Loison 2016) and to adopt only weak counter-factuals. In contrast, there are possible ways to use strong counter-factuals as attempts to “pluralize” the history of biological theory: i.e. imagine new possible avenues for the development of evolutionary biology. The idea that evolution was a theory “in the air” suggests that evolutionary theory could have developed in a world without Darwin, especially if we accept to delete not only “Darwin” but “England”. France and Germany are examined as possible countries where evolutionary ideas would have thrived even with no contribution from the English scientists. Finally, the paper suggests another counter-factual hypothesis: deleting not Darwin and his Origin but the Darwin Industry itself. This may allow us to read the Origin of Species with fresh eyes and to discover Darwin’s life-long interest in variation and its laws, as many of his early readers did. (shrink)

In his seminal essay “The Philosophical Basis of Eighteenth-Century Racism”, Richard Popkin argued that, when one looks more closely at some of the Enlightenment’s most important thinkers, one is c...

I argue that appreciation of the phenomenon of forgetting requires serious attention to its origins and place in nature. This, in turn, necessitates metaphysical inquiry as well as empirical backing – a combination likely to be eschewed by psychological orthodoxy. But, if we hope to avoid the conceptual vacuity that characterizes too much of contemporary psychological inquiry (e.g., Klein, 2012, 2014a, 2015a, 2016a), a “big picture” approach to phenomena of interest is essential. Adopting this investigative posture turns the “received view” (...) of the relation between remembering and forgetting on its head: Rather than treated as the result of breakdowns and limitations of biologically engineered systems of remembering, forgetting is accorded elevated status as the driving force behind the evolution of organic systems of information retention. (shrink)

Archaeology, like most sciences that rely on stratigraphic excavation for studying the past, tends to conceptualize this past as lying deep underneath the ground. Accordingly, chronologies tend to be depicted as a movement from bottom to top, which contrast with sciences that illustrate the passage of time horizontally. By paying attention to the development of the visual language of disciplines that follow stratigraphy, I show how chronologies get entangled with other temporalities, particularly those of writing. Relying on recent ethnographic work (...) with archaeologists, the analysis reveals that excavation emerges as a double vertical movement of downward destruction and upward reconstruction that coincides with a systematic dissociation of time and space that has important effects for the understanding of the formation of sites. I conclude by looking at some of the implications of this dissociation for contemporary theoretical discussions, particularly those that emerged after the phenomenological push to horizontalize the discipline. Challenging this dissociation, I argue that the conceptualization of time in science should be understood as a process that depends on the body and unfolds in movement. (shrink)

Beginning the nineteenth-century and continuing down to the present, many authors writing on the history of geology and paleontology have attributed the theory that fossils were inorganic formations produced within the earth, rather than by the deposition of living organisms, to the ancient Greeks and Romans. Some have even gone so far as to claim this was the consensus view in the classical period up through the Middle Ages. In fact, such a notion was entirely foreign to ancient and medieval (...) thought and only appeared within the manifold of ‘Renaissance episteme,’ the characteristics of which have often been projected backwards by some historians onto earlier periods. This paper endeavors to correct this error, explain the development of the Renaissance view, describe certain ancient precedents thereof, and trace the history of the misinterpretation in the literature. -/- . (shrink)

Modern western political thought revolves around globality, focusing on the partitioning and the connecting up of the earth’s surface. But climate change and the Anthropocene thesis raise pressing questions about human interchange with the geological and temporal depths of the earth. Drawing on contemporary earth science and the geophilosophy of Deleuze and Guattari, this article explores how geological strata are emerging as provocations for political issue formation. The first section reviews the emergence – and eventual turn away from – concern (...) with ‘revolutions of the earth’ during the 18th- and 19th-century discovery of ‘geohistory’. The second section looks at the subterranean world both as an object of ‘downward’ looking territorial imperatives and as the ultimate power source of all socio-political life. The third section weighs up the prospects of ‘earth system governance’. The paper concludes with some general thoughts about the possibilities of ‘negotiating strata’ in more generative and judicious ways. (shrink)

Accounts of the evolutionary past have as much in common with works of narrative history as they do with works of science. Awareness of the narrative character of evolutionary writing leads to the discovery of a host of fascinating and hitherto unrecognized problems in the representation of evolutionary history, problems associated with the writing of narrative. These problems include selective attention, narrative perspective, foregrounding and backgrounding, differential resolution, and the establishment of a canon of important events. The narrative aspects of (...) evolutionary writing, however, which promote linearity and cohesiveness in conventional stories, conflict with the underlying chronicle of evolution, which is not linear, but branched, and which does not cohere, but diverges. The impulse to narrate is so great, however, and is so strongly reinforced by traditional schemes of taxonomic attention, that natural historians have more often abandoned the diverging tree than they have abandoned the narrative mode of representation. If we are to understand the true nature of the evolutionary past then we must adopt “tree thinking”, and develop new and creative ways, both narrative and non-narrative, of telling the history of life. (shrink)

Toulmin is famously seen as the progenitor of informal logic and the related theory of argument and is first among many who seek to move the study of argument away from its roots in formal, especially mathematical, logic. Toulmin’s efforts, however, have been substantively criticized by Harvey Siegel, among others, for failing to offer the sort of foundation that, according to Siegel, even Toulmin sees to be required lest the theory of inquiry fall to impotent relativism. What I will attempt (...) to indicate in this paper is, that although Toulmin is correct in rejecting mathematical logic as standardly construed as an adequate theory of argument, and logical empiricist constructions as an adequate basis for the philosophical understanding of science, there is a significant role for metamathematics in the new logic. In particular, I will show how a formal model based on mature physical science rather than arithmetic furnishes crucial support to Toulmin, furnishing philosophical metaphors that afford the foundational support required for normativity and the clarification of key logical concepts required for a robust normative theory of argument in the context of inquiry. (shrink)

This well-written volume is an introduction, not to world history, but to the special genre of "Big History," as the subtitle indicates. Christian and his fellow big historians, reacting against popular scepticism toward "master narratives," seek to create a new class of grand works that incorporate not only the history of human society, but also of the Earth, its life, and the universe as a whole. Specialists in any of the fields covered by the volume may find rough spots in (...) the treatment of topics they know well, but given the scope of the effort I think it is fair to regard this as something like the first edition of a continuing work. Later editions would be strengthened—as would the Big History movement as a whole—by explicitly incorporating some discussion of teleological reasoning in science, and by deploying clear distinctions between processes that are teleomatic (such as star formation), teleonomic (such as organismal development), and classically teleological (such as intentional behaviour on the part of humans). In "Maps of Time," David Christian has given us a book full of interesting facts, and with ideas to argue for and against in every chapter. It should provoke lively discussion across a whole range of academic disciplines. (shrink)

Norms, Naturalism and Epistemology: The Case for Science Without Norms Jonathan Knowles Houndmills, Palgrave Macmillan, 2003 viii + 182 pp., ISBN 1403902879, £50.00 Jonathan Knowles’s No...

Too often C. S. Peirce’s theory of signs is used simply as a classificatory scheme rather than primarily as a heuristic framework (that is, a framework designed and modified primarily for the purpose of goading and guiding inquiry in any field in which signifying processes or practices are present). Such deployment of his semeiotic betrays the letter no less than the spirit of Peirce’s writings on signs. In this essay, the author accordingly presents Peirce’s sign theory as a heuristic framework, (...) attending to some of the most important ways that it might serve to facilitate a semeiotic investigation of our legal practices. He pays close attention to the ways the topics of history, formalism, reductionism, and generality become, from a Peircean perspective, salient features of legal studies. (shrink)

In this article it is argued that a complex model that includes Toulmin's functional account of argument, the pragma-dialectical stage analysis of argumentation offered by the Amsterdam School, and criteria developed in critical thinking theory, can be used to account for the normativity and field-dependence of argumentation in science. A pragma-dialectical interpretation of the four main elements of Toulmin's model, and a revised account of the double role of warrants, illuminates the domain specificity of scientific argumentation and the restrictions to (...) which the confrontation and opening stages of scientific critical discussions are subjected. In regard to the argumentation stage, examples are given to show that a general account of argumentation, as advocated by informal logicians, is not applicable to arguments in science. Furthermore, although patterns of inference differ in various scientific practices, deductive validity is argued to be a crucial notion in the assessment of scientific arguments. Finally, some remarks are made concerning the burden of proof and the concluding stage of scientific argumentation. (shrink)

The "Darwinian revolution" remains an acceptable phrase to describe the change in thought brought about by the theory of evolution, provided that the revolution is seen as occurring over an extended period of time. The decades from the 1790s through the 1850s are at the focus of this article. Emphasis is placed on the issue of species extinction and on generational shifts in opinion.