Discussions concerning belief revision, theorydevelopment, and ``creativity'' in philosophy andAI, reveal a growing interest in Peirce'sconcept of abduction. Peirce introducedabduction in an attempt to providetheoretical dignity and clarification to thedifficult problem of knowledge generation. Hewrote that ``An Abduction is Originary inrespect to being the only kind of argumentwhich starts a new idea'' (Peirce, CP 2.26).These discussions, however, led to considerabledebates about the precise way in which Peirce'sabduction can be used to explain knowledgegeneration (cf. Magnani, 1999; Hoffmann, 1999).The crucial question (...) is that of understandinghow we can get the new elements capableof enlarging our theories. Under thesecircumstances, it might be helpful to step outof the entanglement and reconsider the basis ofthe problem that originally triggered Peirce'sinterest in abduction. This will lead us toanother Peircean concept, that of ``diagrammaticreasoning,'' which I discuss here in the contextof his ``pragmatism.'' In this way, I hope toreach a better understanding of thecontribution of ``abduction'' to the knowledgegeneration process. (shrink)

Among the many problems posed by Peirce's concept of abduction is how to determine the scope of this form of inference, and how to distinguish different types of abduction. This problem can be illustrated by taking a look at one of his best known definitions of the term:Abduction is the process of forming an explanatory hypothesis. It is the only logical operation which introduces any new idea; for induction does nothing but determine a value, and deduction merely evolves the necessary (...) consequences of a pure hypothesis.The second half of this quote is not part of the definition, but an explanation of it. However, it adds something to this definition because it says implicitly that there are only three logical.. (shrink)

A crucial problem of conflict management is that whatever happens in negotiations will be interpreted and framed by stakeholders based on their different belief-value systems and world views. This problem will be discussed in the first part of this article as the main cognitive problem of conflict management. The second part develops a general semiotic solution of this problem, based on Charles Peirce's concept of "diagrammatic reasoning." The basic idea is that by representing one 's thought in diagrams, the (...) conditions that determine interpretations can become visible, we can "experiment" with them, and we can change them eventually. The third part, finally, focuses on a concrete tool, called Logical Argument Mapping , that can be used in conflict management to perform such diagrammatic reasoning and to cope with the cognitive problems discussed in the first part. The Israeli-Palestinian conflict on the sovereignty over Jerusalem will be used as an example to show how LAM could work in practice. (shrink)

Based on a typology of five basic forms of abduction, I propose a new definition of abductive insight that empha sizes in particular the inferential structure of a belief system that is able to explain a phenomenon after a new, abductive ly created component has been added to this system or the entire system has been abductively restructured. My thesis is, first, that the argumentative structure of the pursued problem solution guides abductive creativity and, second, that diagrammatic reasoning—if conceptualized according (...) to the requirements defined by Charles Peirce—can support this guidance. This support is mainly possible based on the normative power of the system of representation that has to be used to construct diagrams and to perform experiments with them. (shrink)

This volume represents an important contribution to Peirce’s work in mathematics and formal logic. An internationally recognized group of scholars explores and extends understandings of Peirce’s most advanced work. The stimulating depth and originality of Peirce’s thought and the continuing relevance of his ideas are brought out by this major book.

In my previous article on the benzene problem, I described how Pauling's valence bond (resonance) theory, sometimes regarded as a modernized version of Kekule's oscillation hypothesis, came to be accepted by chemists by the end of World War II. But the alternative molecular orbital theory, proposed by Mulliken, had already been developed and was regarded as quantitatively superior by many quantum chemists, though it was not as easy to visualize and did not seem to harmonize as well with traditional chemical (...) concepts. During the 1950s and 1960s, thanks to the efforts of Charles Coulson and many other theorists, the molecular orbital approach not only dominated theoretical discussions but also started to be accepted by the chemical community as a whole and became the preferred description for benzene. Possible reasons were: its greater calculational convenience when applied to large molecules; better expository methods directed toward chemists; the spectacular success of the Woodward-Hoffmann rules for pericyclic reactions and Fukui's frontier orbital theory; and the development of a general theory of aromaticity, which predicted properties of similar molecules such as cyclobutadiene (C4H4). The relative importance of these reasons is explored through a mail survey of chemists. (shrink)

Counterfactual imaginings are known to have far reaching implications. In the present experiment, we ask if imagining events from one's past can affect memory for childhood events. We draw on the social psychology literature showing that imagining a future event increases the subjective likelihood that the event will occur. The concepts of cognitive availability and the source monitoring framework provide reasons to expect that imagination may inflate confidence that a childhood event occurred. However, people routinely produce myriad counterfactual imaginings (i.e., (...) daydreams and fantasies) but usually do not confuse them with past experiences. To determine the effects of imagining a childhood event, we pretested subjects on how confident they were that a number of childhood events had happened, asked them to imagine some of those events, and then gathered new confidence measures. For each of the target items, imagination inflated confidence that the event had occurred in childhood. We discuss implications for situations in which imagination is used as an aid in searching for presumably lost memories. (shrink)

We show that the implicational fragment of intuitionism is the weakest logic with a non-trivial probabilistic semantics which satisfies the thesis that the probabilities of conditionals are conditional probabilities. We also show that several logics between intuitionism and classical logic also admit non-trivial probability functions which satisfy that thesis. On the other hand, we also prove that very weak assumptions concerning negation added to the core probability conditions with the restriction that probabilities of conditionals are conditional probabilities are sufficient to (...) trivialize the semantics. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Ralegh and the Punic WarsCharles G. Salas“For he doth not feign, that rehearseth probabilities as bare conjectures....”Sir Walter Ralegh, The History of the WorldThe Secret HistoryIn 1603 Sir Walter Ralegh was judged guilty of treason and imprisoned in the Tower of London to await execution. The wait was a long one —execution did not take place until 1618—giving this artful courtier, warrior, poet, and poseur time to script new (...) roles for himself. The most memorable of these was historian, and the stage on which he performed was the entire world. Universal history had been a time-honored genre in England, but never had there been so remarkable a performance by a native son as Ralegh’s The History of the World (1614). In five books Ralegh offered to king and country his interpretation of events from Creation to 168 bc. Book V, last and lengthiest of the entire work, deals in large part with the struggle between Rome and Carthage. The story of that struggle is Ralegh’s most mature historical writing and the most revealing of himself, for when he gave up his plan to carry his history into modern times, the Punic Wars became the context for things about the present that he was loath to leave unsaid.Despite its length (about a million words) and premature ending, the History was an enormous success with a public eager to possess the meaning of it all. Oliver Cromwell particularly liked the way it followed “the strange windings and turnings of Providence”; 1 no doubt he found Ralegh’s emphasis upon the Providential control of events reassuring. For Ralegh claimed to show how “kings and kingdoms have flourished and fallen, and for what virtue and piety God made prosperous, and for what vice and deformity he made wretched both the one and the other.” 2 In fact what Ralegh showcased [End Page 195] were the acts of a vengeful, Old Testament God more concerned with punishing monarchical sins than with making monarchs prosperous, and the History was temporarily suppressed by James for being “too saucy in censoring princes.” 3If the king did not like what he saw in the History, the king’s critics did; and Ralegh, never a friend to Puritan or republican in his lifetime, became a hero to both as a pious author and victim of Stuart tyranny. Those sympathetic to the Stuarts, like Alexander Ross, Chaplain to Charles I, saw Ralegh rather differently; but the popularity of the man and his History could not be denied. Ross himself profited from that popularity by doing both an abridgment and a continuation of the History as well as Som Animadversions and Observations upon Sir Walter Raleigh’s Historie of the World. Wherein his mistakes are noted, and som doubtful passages cleered (1653). Many of these animadversions were directed at Ralegh’s treatment of the Punic Wars. Ross recognized that “mistakes” and “doubtful passages” there formed a pattern: “Sir Walter cannot look upon the Roman Glorie with but a squint eye”(8), he complained. But did he also recognize the reason for that squint eye, that Ralegh kept one eye on the past and the other on the present? That many of those “doubtful passages” were in fact strategic elements in a campaign (based on parallels) against Rome, against James, and against James’s ministry? Had this been obvious to Ross, he still would not have said so. Writing under Cromwell, he could no more afford to complain explicitly about abuse of James than Ralegh, writing under James, could afford to make the abuse explicit.Parallels—implicit or imagined—are part and parcel of Ralegh’s providentialism. In brief: God controls events, God does not change, events do not change. This is not to say that Ralegh believed that God’s control was transparent, that God couldn’t change, or that free will did not exist. Ralegh did not solve the great problems of theology. 4 What he is sure about is that the same sins continue to be punished just as they have always been: “So also hath God punished the same and the like sins in all after-times, and... (shrink)

Conclusions reached using common sense reasoning from a set of premises are often subsequently revised when additional premises are added. Because we do not always accept previous conclusions in light of subsequent information, common sense reasoning is said to be nonmonotonic. But in the standard formal systems usually studied by logicians, if a conclusion follows from a set of premises, that same conclusion still follows no matter how the premise set is augmented; that is, the consequence relations of standard logics (...) are monotonic. Much recent research in AI has been devoted to the attempt to develop nonmonotonic logics. After some motivational material, we give four formal proofs that there can be no nonmonotonic consequence relation that is characterized by universal constraints on rational belief structures. In other words, a nonmonotonic consequence relation that corresponds to universal principles of rational belief is impossible. We show that the nonmonotonicity of common sense reasoning is a function of the way we use logic, not a function of the logic we use. We give several examples of how nonmonotonic reasoning systems may be based on monotonic logics. (shrink)

In [2] Hempel and Oppenheim give a definition of “explanation” for a certain formal language. In [1] Eberle, Kaplan, and Montague prove five theorems demonstrating that the Hempel and Oppenheim definition is not restrictive enough. In [3] Kim proposes two further conditions to supplement the Hempel and Oppenheim definition in order to avoid the objections posed in [1]. In this paper it is shown that the definition of Hempel and Oppenheim supplemented by Kim's conditions is open to a trivialization very (...) analogous to that given in [1]. (shrink)

Modern cells present no signs of a putative prebiotic RNA world. However, RNA coding is not a sine qua non for the accumulation of catalytic polypeptides. Thus, cellular proteins spontaneously fold into active structures that are resistant to proteolysis. The law of mass action suggests that binding domains are stabilized by specific interactions with their substrates. Random polypeptide synthesis in a prebiotic world has the potential to initially produce only a very small fraction of polypeptides that can fold spontaneously into (...) catalytic domains. However, that fraction can be enriched by proteolytic activities that destroy the unfolded polypeptides and regenerate amino acids that can be recycled into polypeptides. In this open system scenario the stable domains that accumulate and the chemical environment in which they are accumulated are linked through self coding of polypeptide structure. Such open polypeptide systems may have been the precursors to the cellular ribonucleoprotein (RNP) world that evolved subsequently. (shrink)

The business enterprise is a major instrument in the creation of a just society. However the tension between profit and ethicality requires sound decision making and business ethics instruction is central to creative alternatives to business leaders. Therefore, instruction is aided with a model for framing one’s thoughts about ethics and while several earlier business ethics models exist, they tend to be closed and at times parochial. This paper draws on insights from other academic disciplines to offer a broader yet (...) flexible framework for professors, students, scholars, and decision makers. At the center of the model is the four stage framework of Rest et al. as impacted by four sets of variables—individual, organizational, environmental, and issue. These are rooted in the work of Dunlop’s Industrial Relations Theory and Jones’ Moral Intensity. A literature review of important variables is presented and the paper concludes with several take aways for instruction and policy suggestions. (shrink)

Abstract The increasing prevalence of armed drones in the conduct of military operations has generated robust debate. Among legal scholars, the crux of the dispute generally pits those who herald the new technology's unparalleled precision against those who view such newfound capabilities as an inducement to employ excessive force. Largely overlooked in the discussion over how drone strikes can be accomplished lawfully is a more fundamental question: Can a model of warfare that eschews any risk of harm to one party (...) be squared with the ethical framework that informs the law of war? This matter has less to do with the technology per se than with a policy orientation that utilizes such technology as a strategy in itself, as opposed to one military tool in a larger arsenal. A corollary to the incongruity of riskless warfare is to query whether the ensuing breakdown of ethical and legal norms unwittingly encourages the very instability that the law of war attempts to control, thereby endangering the civilian populations of all parties to the conflict. While other authors have previously addressed the challenges posed by asymmetry to the law of armed conflict in different formats, this article explores these issues through a hypothetical scenario and seeks to elucidate some of the potential ramifications of the pursuit of physical impunity in war. (shrink)

Dawkins in his The Selfish Gene(1) quite aptly applies the term “selfish” to parasitic repetitive DNA sequences endemic to eukaryotic genomes, especially vertebrates. Doolittle and Sapienza(2) as well as Orgel and Crick(3) enlivened this notion of selfish DNA with the identification of such repetitive sequences as remnants of mobile elements such as transposons. In addition, Orgel and Crick(3) associated parasitic DNA with a potential to outgrow their host genomes by propagating both vertically via conventional genome replication as well as infectiously (...) by horizontal gene transfer (HGT) to other genomes. Still later, Doolittle(4) speculated that unchecked HGT between unrelated genomes so complicates phylogeny that the conventional representation of a tree of life would have to be replaced by a thicket or a web of life.(4) In contrast, considerable data now show that reconstructions based on whole genome sequences are consistent with the conventional “tree of life”.(5–10) Here, we identify natural barriers that protect modern genome populations from the inroads of rampant HGT. BioEssays 27:741–747, 2005. © 2005 Wiley Periodicals, Inc. (shrink)

Erasmus’s Adages were among his most influential works in his own time, particularly later editions, which included both Greek and Latin. In the adages included in volumes 35 and 36, Erasmus criticizes secular and ecclesiastical life, commenting on topics such as war, reform of the church and spiritual life, and the corrupting effects of the relentless pursuit of wealth and power. Erasmus aims his narrative and commentary in Paraphrase on the Gospel of Matthew (volume 45) at a general educated audience (...) (rather than professional theologians). Together, these volumes provide readable and accurate edition of Erasmus’s work and helpful special indexes. (shrink)

(2012). The Making of the Humanities, vol. 1: Early Modern Europe. Intellectual History Review: Vol. 22, No. 2, pp. 293-296. doi: 10.1080/17496977.2012.694178.

Collingwood's attitude toward literary sources is related to the method of selective excavation. But as an excavator, Collingwood came in for some criticism from his fellow archaeologists. Collingwood's treatment of four historical problems is considered: why Caesar invaded Britain, why Augustus did not, how the Claudian conquest proceeded, and why Hadrian built his wall and vallum. Collingwood concluded that Caesar intended to conquer, Augustus did not, and that the vallum served a civil rather than military purpose. In trying to identify (...) past thought Collingwood approaches literary sources and archaeological remains with particular questions in mind. Questions and answers being correlative, this often amounts to having made up his mind in advance. When he comes to the evidence itself, he sees what he expects to see ; occasionally what he sees is not in fact there. Where Collingwood creates a history, Peter Salway sometimes seems to be summarizing a subject. With Collingwood, however, we more than participate in processes of thought, we actually see the connections. Collingwood makes the real rational, and no historian of Roman Britain has done that better. (shrink)

The twelve contributors to Looking for Los Angeles focus on dramatic shifts in the urban landscape, important moments in the city's architectural history, and the role of the image in this mecca of image makers.