In this paper, I present an interpretation of Kant’s view that reason’s hypostasis of the idea of a sum-total of reality is dogmatic and illegitimate. In the section on the ‘Transcendental Ideal’, the second section of the Ideal of Pure Reason chapter in the Critique of Pure Reason, Kant starts by describing reason’s procedure from the affirmation of the principle of thoroughgoing determination to the hypostasis in question. According to the interpretation I defend, the argument for hypostasis deployed in this (...) section constitutes an improvement upon an argument defended by the pre-critical Kant himself in his 1673 essay “The Only Possible Argument in Support of a Demonstration of the Existence of God”. By making reference to the concept of omnitudo realitatis, the argument in the ‘Transcendental Ideal’ section presents a much more radical and convincing interpretation of the thesis that ‘possibility presupposes actuality’. Second, I present transcendental idealism and its related distinction between objects of sense and objects in general as the main dissuasive argument of the critical philosopher against hypostasis. Finally, I consider an argument against hypostasis that is independent of transcendental idealism: the threat of set-theoretical paradoxes if we hypostatize the relevant idea, intended as the concept of an absolutely comprehensive totality. (shrink)

El artículo elabora el concepto de campo filosófico desde la Historia social de la filosofía y en resonancia con Bourdieu, tratando la noción de opinión pública y mostrando, en perspectiva histórica, el papel del intelectual en la constitución de esta. Seguidamente ofrece un estudio de caso a partir de la obra de la filósofa colombiana Laura Quintana y sus constantes intervenciones en la esfera pública evidenciando, en este apartado, que el papel del intelectual no puede ser el del paternalismo crítico, (...) que subvalora a los sujetos y sus capacidades, sino que debe ofrecer y crear maneras nuevas de comprender el mundo, lo cual, a la larga, contribuye a su transformación. (shrink)

I define two metaphysical positions that anti-physicalists can take in response to Jonathan Schaffer’s ground functionalism. Ground functionalism is a version of physicalism where explanatory gaps are everywhere. If ground functionalism is true, arguments against physicalism based on the explanatory gap between the physical and experiential facts fail. In response, first, I argue that some anti-physicalists are already safe from Schaffer’s challenge. These anti-physicalists reject an underlying assumption of ground functionalism: the assumption that macrophysical entities are something over and above (...) the fundamental entities. I call their position “lightweight anti-physicalism.” Second, I go on to argue that even if anti-physicalists accept Schaffer’s underlying assumption, they can still argue that the consciousness explanatory gap is especially mysterious and thus requires a special explanation. I call the resulting position “heavyweight anti-physicalism.” In both cases, the consciousness explanatory gap is a good way to argue against physicalism. (shrink)

ABSTRACT In this article, the first author provides a summary and translation from the Latin of an important early medical lecture on vampires by Nils Retzius. The lecture was delivered in Sweden, at Lund University, in 1737, and was published almost immediately thereafter. This important text has been overlooked by modern scholars of vampires. This article will bring the lecture back into circulation in its first English translation. The second author then offers an analysis of the intellectual background to this (...) rational debunking of vampires. He demonstrates how Retzius’s attempt at a comprehensive rational explanation for vampires, typical of much Enlightenment thinking, nevertheless employs a fusion of Galenic medical thinking with more modern medical and psychosomatic notions of medicine, as well as certain Lutheran notions concerning the devil and the spirit world. His argument scotches the belief in the idea of sympathetic magic affecting the dreams of the living, while emphasising the psychosomatic effects of the imagination on the physical body. (shrink)

Panpsychists aspire to explain human consciousness, but can they also account for the physical world? In this paper, I argue that proponents of a popular form of panpsychism cannot. I pose a new challenge against this form of panpsychism: it faces an explanatory gap between the fundamental experiences it posits and some physical entities. I call the problem of explaining the existence of these physical entities within the panpsychist framework “the missing entities problem.” Spacetime, the quantum state, and quantum gravitational (...) entities constitute three explanatory gaps as instances of the missing entities problem. Panpsychists are obliged to solve all instances of the missing entities problem; otherwise, panpsychism cannot be considered a viable theory of consciousness. (shrink)

A family \ is called Rosenthal if for every Boolean algebra \, bounded sequence \ of measures on \, antichain \ in \, and \, there exists \ such that \<\varepsilon \) for every \. Well-known and important Rosenthal’s lemma states that \ is a Rosenthal family. In this paper we provide a necessary condition in terms of antichains in \}\) for a family to be Rosenthal which leads us to a conclusion that no Rosenthal family has cardinality strictly less (...) than \\), the covering of category. We also study ultrafilters on \ which are Rosenthal families—we show that the class of Rosenthal ultrafilters contains all selective ultrafilters. (shrink)

Paraconsistent logics are logical systems that reject the classical principle, usually dubbed Explosion, that a contradiction implies everything. However, the received view about paraconsistency focuses only the inferential version of Explosion, which is concerned with formulae, thereby overlooking other possible accounts. In this paper, we propose to focus, additionally, on a meta-inferential version of Explosion, i.e. which is concerned with inferences or sequents. In doing so, we will offer a new characterization of paraconsistency by means of which a logic is (...) paraconsistent if it invalidates either the inferential or the meta-inferential notion of Explosion. We show the non-triviality of this criterion by discussing a number of logics. On the one hand, logics which validate and invalidate both versions of Explosion, such as classical logic and Asenjo–Priest’s 3-valued logic LP. On the other hand, logics which validate one version of Explosion but not the other, such as the substructural logics TS and ST, introduced by Malinowski and Cobreros, Egré, Ripley and van Rooij, which are obtained via Malinowski’s and Frankowski’s q- and p-matrices, respectively. (shrink)

Infectious logics are systems that have a truth-value that is assigned to a compound formula whenever it is assigned to one of its components. This paper studies four-valued infectious logics as the basis of transparent theories of truth. This take is motivated as a way to treat different pathological sentences differently, namely, by allowing some of them to be truth-value gluts and some others to be truth-value gaps and as a way to treat the semantic pathology suffered by at least (...) some of these sentences as infectious. This leads us to consider four distinct four-valued logics: one where truth-value gaps are infectious, but gluts are not; one where truth-value gluts are infectious, but gaps are not; and two logics where both gluts and gaps are infectious, in some sense. Additionally, we focus on the proof theory of these systems, by offering a discussion of two related topics. On the one hand, we prove some limitations regarding the possibility of providing standard Gentzen sequent calculi for these systems, by dualizing and extending some recent results for infectious logics. On the other hand, we provide sound and complete four-sided sequent calculi, arguing that the most important technical and philosophical features taken into account to usually prefer standard calculi are, indeed, enjoyed by the four-sided systems. (shrink)

The present study aimed at investigating the heavy metals concentrations in the soils around “Larga de Sus” abandoned mine, evaluating the potential ecological risk of heavy metal pollution and highlighting ethical aspects related to risk assessment, ecological restoration, and soil remediation. The results of the chemical analysis showed that the soil in the study area is highly polluted with heavy metals since the average concentrations of Pb, and Ni in soil exceed their corresponding threshold established by the Romanian legislation. The (...) potential ecological risk index method developed by Hakanson was used to assess the potential risk of heavy-metal pollution. The results indicated that Pb and Ni showed severe and considerable potential ecological risk, while Cr had lightly ecological risk. In this case, remediation should be focused only on Pb or on all heavy metals even if they have lightly ecological risk? A scientific management technique cannot logically prescribe which choices should be selected. The interaction between human activity and the environment is complicated and difficult to quantify and risk management cannot and should not be based simply on risk assessment results. What is needed to make the right choice of the most appropriate alternative that fits our personality, culture, religion, and desires? The moral and ethical implications of ecological restoration and soil remediation have to be incorporated within the decision-making process in order to make optimum sustainable decisions and to achieve real environmental protection. (shrink)

This paper extends Fitting's epistemic interpretation of some Kleene logics, to also account for Paraconsistent Weak Kleene logic. To achieve this goal, a dualization of Fitting's "cut-down" operator is discussed, rendering a "track-down" operator later used to represent the idea that no consistent opinion can arise from a set including an inconsistent opinion. It is shown that, if some reasonable assumptions are made, the truth-functions of Paraconsistent Weak Kleene coincide with certain operations defined in this track-down fashion. Finally, further reflections (...) on conjunction and disjunction in the weak Kleene logics accompany this paper, particularly concerning their relation with containment logics. These considerations motivate a special approach to defining sound and complete Gentzen-style sequent calculi for some of their four-valued generalizations. (shrink)

At the end of May 1917, Max Weber attended a “cultural congress” at the picturesque castle of Lauenstein in Thuringia. The congress had been organized by the publicist Eugen Diederichs of Jena and by the Patriotic Society for Thuringia 1914. The moment was a particularly tense one in the life of the embattled German Reich. Against the advice of many cooler heads within the country, Germany had declared unrestricted submarine warfare in January, which together with other antagonistic moves on its (...) part, had led to the entry of the United States into the war in April. By this point it was clear to all but the most indefatigable optimists that Germany would lose the war. In this atmosphere of dread and of new hope that a phoenix-like new Germany or a new humanity would arise out of the ashes of the war, the participants outlined their visions of the future. The eccentric former Social Democrat-turned-nationalist Max Maurenbrecher denounced capitalist mechanization but called for a revival of the traditional Prussian concept of the state, for an “idealistic state” and for workers to be educated towards national consciousness by means of the German literary and philosophical classics. (shrink)

The project behind this and the following1 special issue of Angelaki first assumed concrete form in the shape of a three-day international conference, “Continental Philosophy and the Sciences,” hel...

In this article we revisit a number of disputes regarding significance logics---i.e., inferential frameworks capable of handling meaningless, although grammatical, sentences---that took place in a series of articles most of which appeared in the Australasian Journal of Philosophy between 1966 and 1978. These debates concern (i) the way in which logical consequence ought to be approached in the context of a significance logic, and (ii) the way in which the logical vocabulary has to be modified (either by restricting some notions, (...) or by adding some vocabulary) to keep as much of Classical Logic as possible. Our aim is to show that the divisions arising from these disputes can be dissolved in the context of a novel and intuitive proposal that we put forward. (shrink)

This article takes stock of the project of ecological democracy, a project that has been central to debates in Environmental Values since the late 1990s. Whilst we can identify quite distinct articulations of eco-democratic thinking emerging out of the fields of green political theory, postcolonial/feminist political ecology and science studies/radical geography, it is argued that these discussions have reached something of an impasse of late following the rise of climate scepticism, authoritarian populisms and technocratic eco-modernisms. Resurgent eco-authoritarian impulses and the (...) hankering for a 'green leviathan', a climate Lenin or a 'dictatorship of the sustainment' to resolve our climate crisis make it more important than ever to affirm the need for just, rapid and democratic post-carbon transitions. The article goes on to outline how emerging discussions in radical design studies focused on redirective practice in conjunction with a revived eco-socialist focus on labour-focused political ecologies might open up different possibilities for a materialist re-grounding of ecodemocratic discussions. It is suggested that a political ecology of design embedded in public institutions, the workplace and civil society could possibleyreground a more substantive vision of ecological democracy but also allow us to think about the forms of creative labour that could drive the just transition. (shrink)

This paper presents a novel argument against one theoretically attractive form of panpsychism. I argue that “idealist panpsychism” is false since it cannot account for spacetime’s structure. Idealist panpsychists posit that fundamental reality is purely experiential. Moreover, they posit that the consciousness at the fundamental level metaphysically grounds and explains both the facts of physics and the facts of human consciousness. I argue that if idealist panpsychism is true, human consciousness and the consciousness at the fundamental level will have the (...) same metrical structure. However, as I demonstrate, human consciousness does not exhibit the same metrical structure as spacetime. Consequently, the idealist panpsychist faces an explanatory gap between the fundamental consciousness she posits and spacetime. Idealist panpsychism is incompatible with the existence of such an explanatory gap. Thus, idealist panpsychists must close this explanatory gap (which I argue they lack the resources to do), or idealist panpsychism is false. (shrink)

Plotinus on the Soul is a study of Plotinus' psychology, which is arguably the most sophisticated Platonist theory of the soul in antiquity. Plotinus offers a Platonist response to Aristotelian and Stoic conceptions of the soul that is at the same time an innovative interpretation of Plato's Timaeus. He considers the notion of the soul to be crucial for explaining the rational order of the world. To this end, he discusses not only different types of individual soul but also an (...) entity that he was the first to introduce into philosophy: the so-called hypostasis Soul. This is the first study to provide a detailed explanation of this entity, but it also discusses the other types of soul, with an emphasis on the human soul, and explains Plotinus' original views on rational thought and its relation to experience. (shrink)

We provide a logical matrix semantics and a Gentzen-style sequent calculus for the first-degree entailments valid in W. T. Parry’s logic of Analytic Implication. We achieve the former by introducing a logical matrix closely related to that inducing paracomplete weak Kleene logic, and the latter by presenting a calculus where the initial sequents and the left and right rules for negation are subject to linguistic constraints.

In Kripke’s classic paper on truth it is argued that by adding a new semantic category different from truth and falsity it is possible to have a language with its own truth predicate. A substantial problem with this approach is that it lacks the expressive resources to characterize those sentences which fall under the new category. The main goal of this paper is to offer a refinement of Kripke’s approach in which this difficulty does not arise. We tackle this characterization (...) problem by letting certain sentences belong to more than one semantic category. We also consider the prospect of generalizing this framework to deal with languages containing vague predicates. (shrink)

Since its inception, donor conception practices have been a reproductive choice for the infertile. Past and current practices have the potential to cause significant and lifelong harm to the offspring through loss of kinship, heritage, identity, and family health history, and possibly through introducing physical problems. Legislation and regulation in Australia that specifies that the welfare of the child born as a consequence of donor conception is paramount may therefore be in conflict with the outcomes. Altering the paradigm to a (...) child-centric model, however, impinges on reproductive choice and rights of adults involved in the process. With some lobby groups pushing for increased reproductive choice while others emphasise offspring rights there is a dichotomy of interests that society and legislators need to address. Concepts pertaining to a shift toward a child-centric paradigm are discussed. (shrink)

This paper articulates a conception of organizational justice based on the promise of a mode of organizing that does not violate the particularity of each and every other person. It argues that the decisive condition for such a form of justice resides in the realities of the cultural practices of an organization as they are apparent in the conduct of people in relation to multiple others. These are practices that can only seek justification in the primary right of each person (...) to be regarded with absolute alterity. It also argues that a degree of violence is unavoidable within any practical ordering of justice and that any consideration of ethics and justice in organizations must account for such violence and seek to negotiate its existence on ethical terms. The organizational justice that is referred to is one sensitive to the exercise of its own power and authority in the context of its unavoidable violation of its basis in ethics. This is a justice that is ethically necessary, but is never sure of itself. (shrink)

This paper articulates a conception of organizational justice based on the promise of a mode of organizing that does not violate the particularity of each and every other person. It argues that the decisive condition for such a form of justice resides in the realities of the cultural practices of an organization as they are apparent in the conduct of people in relation to multiple others. These are practices that can only seek justification in the primary right of each person (...) to be regarded with absolute alterity. It also argues that a degree of violence is unavoidable within any practical ordering of justice and that any consideration of ethics and justice in organizations must account for such violence and seek to negotiate its existence on ethical terms. The organizational justice that is referred to is one sensitive to the exercise of its own power and authority in the context of its unavoidable violation of its basis in ethics. This is a justice that is ethically necessary, but is never sure of itself. (shrink)

We examine the set of formula-to-formula valid inferences of Classical Logic, where the premise and the conclusion share at least a propositional variable in common. We review the fact, already proved in the literature, that such a system is identical to the first-degree entailment fragment of R. Epstein's Relatedness Logic, and that it is a non-transitive logic of the sort investigated by S. Frankowski and others. Furthermore, we provide a semantics and a calculus for this logic. The semantics is defined (...) in terms of a \-matrix built on top of a 5-valued extension of the 3-element weak Kleene algebra, whereas the calculus is defined in terms of a Gentzen-style sequent system where the left and right negation rules are subject to linguistic constraints. (shrink)

The present note revisits the joint work of Leonard Goddard and Richard Routley on significance logics with the aim of shedding new light on their understanding by studying them under the lens of recent semantic developments, such as the plurivalent semantics developed by Graham Priest. These semantics allow sentences to receive one, more than one, or no truth-value at all from a given carrier set. Since nonsignificant sentences are taken to be neither true nor false, i.e. truth-value gaps, in this (...) essay we show that with the aid of plurivalent semantics it is possible to straightforwardly instantiate Goddard and Routley’s understanding of how the connectives should work within significance logics. (shrink)

Where does the impetus towards ethical theory come from? What drives humans to make values explicit, consistent, and discursively justifiable? This paper situates the demand for ethical theory in human life by identifying the practical needs that give rise to it. Such a practical derivation puts the demand in its place: while finding a home for it in the public decision-making of modern societies, it also imposes limitations on the demand by presenting it as scalable and context-sensitive. This differentiates strong (...) forms of the demand calling for theory from weaker forms calling for less, and contexts where it has a place from contexts where it is out of place. In light of this, subjecting personal deliberation to the demand turns out to involve a trade-off. (shrink)

The global ecological crisis is upon us. From global warming to the long-term implications of ocean acidification, air and water pollution, deforestation, and the omnipresent dangers of nuclear technology the future of our planetary home is threatened. Yet in the midst of the unfolding crisis, the conventional ideologies of the twentieth century and their representations of nature remain unchallenged by both the defenders of capitalism and capitalism's most radical critics. The Distortion of Nature's Image illustrates how the anti-naturalism of late (...) capitalist society, in which nature is reified into the emptiness of mere matter, simply a thing to be dominated, is subtly complemented by the failure of the Left to go both beyond the historic limitations of Marx's ninteenth-century viewpoint and beyond anarchism's blind faith in "natural law." However, an alternative for comprehending nature and the ecological crisis as historical and social phenomena remains open in the dialectical naturalism of Western Marxism and Murray Bookchin's social ecology. By examining in closer detail how Bookchin's social ecology politicizes the concept of nature, as well as how precursory models in Western Marxist thought provide a foundation for this, Damian Gerber illustrates how the notion of an ecological society remains a decisively political question. (shrink)

One of the earliest refutations of the Visum et Repertum (1732) by Johann Flückinger was from Johann Wilhelm Nöbling, a young student of philosophy and theology at the University of Jena, who attacked the findings from a position of scientific scepticism enshrouded with Lutheran theology in his thesis Concerning the Blood-Sucking Corpses of those so-called Vampires or People-Suckers. While he is best remembered for first proposing the incubus or nightmare of sleep paralysis as being the real cause of the superstition, (...) his major contribution was theological, concerning the relation between body and soul. And yet while Nöbling provides a rigorous, scripture-based denial of vampirism, his framework necessarily accommodates contemporary medical theory, demonstrating both the adaptation of theology to science and the extent to which pneumatology still inhered in scientific enquiry. (shrink)

Albert and Cederman couch the neorealist perspective in terms of ‘systems’ theorizing, Ferguson and Mansbach rhetorically discuss issues and non-issues which are readily addressed within the neoliberal perspective, and of course, Onuf is unabashedly a constructivist. Below, I discuss each theoretical perspective relative to the articles assigned, and, thereafter conclude with some observations on the three articles and theoretical frameworks.

Prior to Citizen’s United, particular types of corporate spending for purposes of influencing US-election-outcomes were limited due to an inherent skepticism of corporate influence in American politics. It was presumed that where corporations accessed wealth and resources for purposes of electing candidates that best serve corporate interests, American politics would be corrupted—indeed: democracy that is bought and sold. In the US, the juridical is entirely systematized by the ethos of the legal profession: legalism. It is the way in which the (...) law is supposed to be reasoned upon, deliberated upon, and decided upon. Although the Majority in Citizens expressed its reversal of law that limits corporate influence in American politics in legalese—the terminology within the system of legalism, the conservative Majority took an opportunity to establish conservative ideology as law—an ideology that subscribes to the equivocation between corporations and individuals, and, corporate spending with protected free-speech. (shrink)

How should business deal with society's increasing demands for ethical and social responsibility? In plain language this book considers these and other ethical questions of direct relevance to business in the 1990s. It discusses the nature of ethics, ethical reasoning, the use of stakeholder analysis, and other central concepts used in business ethics. Using mainly, but not exclusively, Australian cases and specific examples, the book covers issues such as fairness in business dealings, advertising ethics, discrimination, and codes of ethics.

This book sets out in plain language ethical questions of direct relevance to business today. This new edition expands the range of issues covered and includes a chapter on international business ethics, drawing extensively from Asian examples.

Under the UDHR, all persons have the right to "seek and to enjoy . . . asylum from persecution." From this designation as fundamental followed codification of the right in the 1951 Convention relating to the Status of Refugees and the 1967 Protocol Relating (collectively 'the Convention'), the "centrepiece" of treaties and customary norms that make up international refugee law. It defines and regulates the status and rights of refugees; its purpose is to safeguard the basic rights of persons "outside (...) their country of origin," who have fled due to a legitimate fear of persecution. Fundamentally, it guarantees that asylees and refugees enjoy rights without discrimination; without penalization for illegal territorial entry; and, without expulsion or return to "territories where . . . life or freedom would be threatened on account of . . . race, religion, nationality, membership of a particular social group or political opinion," —or 'non-refoulement'. What follows is background on development of the principle of non-refoulement, evasive US Asylum Cooperative Agreements ('ACAs') and implementing legislation, and the resulting erosion to the right to asylum. (shrink)

This paper discusses a dualization of Fitting's notion of a "cut-down" operation on a bilattice, rendering a "track-down" operation, later used to represent the idea that a consistent opinion cannot arise from a set including an inconsistent opinion. The logic of track-down operations on bilattices is proved equivalent to the logic d_Sfde, dual to Deutsch's system S_fde. Furthermore, track-down operations are employed to provide an epistemic interpretation for paraconsistent weak Kleene logic. Finally, two logics of sequential combinations of cut-and track-down (...) operations allow settling positively the question of whether bilattice-based semantics are available for subsystems of S_fde. (shrink)

We prove that if $$\mathcal {A}$$ A is an infinite Boolean algebra in the ground model V and $$\mathbb {P}$$ P is a notion of forcing adding any of the following reals: a Cohen real, an unsplit real, or a random real, then, in any $$\mathbb {P}$$ P -generic extension V[G], $$\mathcal {A}$$ A has neither the Nikodym property nor the Grothendieck property. A similar result is also proved for a dominating real and the Nikodym property.

En este ensayo muestro las causas de la poca recepción del pensamiento filosófico de Xavier Zubiri en Colombia, entre ellas, el hecho de que su obra no fue publicada, lo que implicó la ausencia de discusión con su pensamiento. Al mismo tiempo, la corta influencia de Zubiri en los filósofos exiliados en 1939. Otras razones fueron el magisterio de Ortega y Gasset en América quien ocultó a Zubiri; la fobia por el pensamiento español que los filósofos universalistas crearon, y la (...) existencia de un culto acrítico en las universidades confesionales. Explico las razones históricas de esa escasa recepción y propongo superar esas dificultades para expandir el horizonte de nuestra filosofía. (shrink)

What old Fascisms and new nationalisms circulate in the political spaces of Europe? Through an analysis of their split on immigration policy in 2003, this article examines the myths and ideologies of the two major far right parties in Italy, the Lega Nord and the Alleanza Nazionale. It argues that the anti-imperial mythology of the Lega, based on the defence of Lombardy against the Holy Roman Empire, has led it into a modernist politics of territoriality, borders and homogeneity. On the (...) other hand, the Alleanza Nazionale has used its Fascist heritage, and in particular the mythologizing of the Roman empire, to open up a postmodern imperial politics, involving the expansion of borders, and the incorporation of new peoples and territories. Through the use of interviews with militants and deputies, it looks at how the Alleanza has re-articulated imperial Fascist mythologies within a new pro-European Union discourse, while the Lega has maintained its role of protest against deterritorialization despite the seeming inevitability of the territorial integration. (shrink)

For the purposes of this enquiry—an account of what Equiano’sa modernity was, and which particular historical ‘demarcations’ of modernity provided for an enslaved man to achieve freedom through great fortune and great cunning, I will assume a definition of ‘modernity’ as defined by Kathleen Wilson: “. . . not one moment or age, but a set of relations that are constantly being made and unmade, contested and reconfigured, that nonetheless produce among their contemporaneous witnesses the conviction of historical difference.” By (...) adopting this definition, modernity in the times of Equiano refers to, “the cultural practices and representations that produced certain kinds of subjects and objects of knowledge, upheld widely-shared notions of space and time, or facilitated the formation of cultural identities that resulted in pluralities and contradictions as well as unities and coherences,” which provided for a slave to acquire freedom amidst eighteenth-century imperialism, slave-trade, and emerging abolitionist sentiments within bourgeois culture. (shrink)

An application of the Method of Analysis of Relational Complexity (MARC) to suppositional reasoning in the knight-knave task is outlined. The task requires testing suppositions derived from statements made by individuals who either always tell the truth or always lie. Relational complexity (RC) is defined as the number of unique entities that need to be processed in parallel to arrive at a solution. A selection of five ternary and five quaternary items were presented to 53 psychology students using a pencil (...) and paper format. A computer-administered version was presented to 50 students. As predicted, quaternary problems were associated with higher error rates and longer response times than ternary problems. The computer-administered form was more difficult than the pencil and paper version of the test. These differences are discussed in terms of RC theory and alternative processing accounts. Together, they indicate that the relational complexity metric is a useful and parsimonious way to quantify complexity of reasoning tasks. (shrink)