Evidentiary propositions E 1 and E 2, each p-positively relevant to some hypothesis H, are mutually corroborating if p > p, i = 1, 2. Failures of such mutual corroboration are instances of what may be called the corroboration paradox. This paper assesses two rather different analyses of the corroboration paradox due, respectively, to John Pollock and Jonathan Cohen. Pollock invokes a particular embodiment of the principle of insufficient reason to argue that instances of the corroboration paradox are of negligible (...) probability, and that it is therefore defeasibly reasonable to assume that items of evidence positively relevant to some hypothesis are mutually corroborating. Taking a different approach, Cohen seeks to identify supplementary conditions that are sufficient to ensure that such items of evidence will be mutually corroborating, and claims to have identified conditions which account for most cases of mutual corroboration. Combining a proposed common framework for the general study of paradoxes of positive relevance with a simulation experiment, we conclude that neither Pollock’s nor Cohen’s claims stand up to detailed scrutiny. I am quite prepared to be told…”oh, that is an extreme case: it could never really happen!” Now I have observed that this answer is always given instantly, with perfect confidence, and without any examination of the proposed case. It must therefore rest on some general principle: the mental process being something like this—“I have formed a theory. This case contradicts my theory. Therefore, this is an extreme case, and would never occur in practice.”Rev. Charles L. Dodgson. (shrink)

This paper examines the way Charles Darwin applied his domestic breeding analogy to the practical workings of species evolution: that application, it is argued, centered on Darwin's distinction between methodical and unconscious selection. Methodical selection, which entailed pairing particular individuals for mating purposes, represented conditions of strict geographic isolation, obviously useful for species multiplication (speciation). By contrast, unconscious selection represented an open landmass with a large breeding population. Yet Darwin held that this latter scenario, which often would include multiple (...) ecological subdistricts and thus partial isolation, was better suited for speciation than were isolated conditions. At the same time, many passages in Darwin's writings that apparently portrayed phyletic evolution exclusively (these including references to unconscious selection), actually applied to speciation as well, for phyletic change in a single district could constitute a local manifestation of a larger common-descent pattern. This generic use of "phyletic" change was reflected in Darwin's deployment of the unconscious selection analogy in his published writings as well as in his dispute with Moritz Wagner over the necessity of geographic isolation for speciation. We can thus understand Darwin's otherwise puzzling declaration in The Origin of Species that unconscious selection was 'more important' than the methodical approach. (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)

The intuitive notion behind the usual semantics of most systems of modal logic is that of ?possible worlds?. Loosely speaking, an expression is necessary if and only if it holds in all possible worlds; it is possible if and only if it holds in some possible world. Of course, contradictory expressions turn out to hold in no possible worlds, and logically true expressions turn out to hold in every possible world. A method is presented for transforming standard modal systems into (...) systems of modal logic for impossible worlds. To each possible world there corresponds an impossible world such that an expression holds in the impossible world if and only if it does not hold in the possible world. One can then talk about such worlds quite consistently, and there seems to be no logical reason for excluding them from consideration. (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.

Most of us came into ecology with memories of special personal places. A cliff top that Claude Monet might have painted. Allen as a youth spent his holidays on the Dorset Coast near Swanage; he can still smell the sea breeze of his childhood. Curtin grow up on a farm in southwestern Wisconsin, the dew of the grass and the bright green on a June morning remains vivid. The catching of reptiles and insects for him awakened a curiosity about the (...) natural world that has remained to this day. But once into the field there came the scholarship. With ever tighter grant monies, the pressure to publish takes so much of the fun out of it. A climate of unbridled careerism prevails and shows itself in the incremental state of the literature: little things to list on this year's activities report. There are now even predatory journals that cynically do not seriously review submissions, and only collect page charges. As journal editors have a desperate time getting reviews done by mature scholars, instead of a hand off to their overworked graduate students. So what is to be done - how can we bring the joy and importance of discovery back into it all? After all ecology is done by human beings. Mostly it is a personal mission, for what great ecologists write is frequently personal and life changing. So an undercurrent of this book is to remind and reveal the original purpose of science. Not professional advancement, but the genuine search for novel ideas and the imperative to share hard won insights and personal passions. (shrink)

The usual semantics for the modal systems T, S4, and S5 assumes that the set of possible worlds contains at least one member. Recently versions of these modal systems have been developed in which this assumption is dropped. The systems discussed here are obtained by slightly weakening the liberated versions of T and S4. The semantics does not assume the existence of possible worlds, and the accessibility relation between worlds is only required to be quasi-reflexive instead of reflexive. Completeness and (...) independence results are established. (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)

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)

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)

Almost every formal model of explanation thus far proposed has been demonstrated to be faulty. In this paper, a new model, proposed by Raimo Tuomela, is also demonstrated to be faulty. In particular, one condition of the model is shown to be too restrictive, and another condition of the model is shown to be too permissive.

In a curious turn of phrase that he offered to a particular congregation, Augustine claims that a belch became the Gospel: “Ipsa ructatio euangelium est.” The reference comes at the end of a longer digression in Sermon (s.) 341 [Dolbeau 22] about how John the Evangelist, a fisherman, came to produce his Gospel, namely he belched out what he drank in. The use of a mundane word like ructare in an oration concerning a divine being contravenes a rhetorical prohibition known (...) as tapinosis. This kind of speech was prohibited in ancient oratory because it humiliated the subject of the declamation, and this was especially problematic if the subject was divine. According to Augustine’s reading of scripture, if the divine willfully chose to be humiliated in order to teach humility to others by example, then the person delivering a speech about the divine could contravene this oratorical vice. This article argues that Augustine does precisely that in s. 341 by examining the reasons for Augustine’s use of the terms ructare and iumentum. Specifically, it traces their usage in various Latin texts from Cicero to Plautus to the Psalms. It argues that the virtue of humility is manifest in the very language which Augustine deploys all along the way. (shrink)

In a curious turn of phrase that he offered to a particular congregation, Augustine claims that a belch became the Gospel: “Ipsa ructatio euangelium est.” The reference comes at the end of a longer digression in Sermon 341 [Dolbeau 22] about how John the Evangelist, a fisherman, came to produce his Gospel, namely he belched out what he drank in. The use of a mundane word like ructare in an oration concerning a divine being contravenes a rhetorical prohibition known as (...) tapinosis. This kind of speech was prohibited in ancient oratory because it humiliated the subject of the declamation, and this was especially problematic if the subject was divine. According to Augustine’s reading of scripture, if the divine willfully chose to be humiliated in order to teach humility to others by example, then the person delivering a speech about the divine could contravene this oratorical vice. This article argues that Augustine does precisely that in s. 341 by examining the reasons for Augustine’s use of the terms ructare and iumentum. Specifically, it traces their usage in various Latin texts from Cicero to Plautus to the Psalms. It argues that the virtue of humility is manifest in the very language which Augustine deploys all along the way. (shrink)

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)