We study the weak truth-table and truth-table degrees of the images of subsets of computable structures under isomorphisms between computable structures. In particular, we show that there is a low c.e. set that is not weak truth-table reducible to any initial segment of any scattered computable linear ordering. Countable $\Pi _{1}^{0}$ subsets of 2ω and Kolmogorov complexity play a major role in the proof.

I had my accident on the rugby field on July 29, 2000 about 2.00 p.m. during a simple line - out, even before the ball was thrown in. I t just felt like another simple case of concussion , I staggered to the sideline, the coach asked me “what ’s wrong”? He said I told him I just felt sick and to put me back on the field in 10 minutes. Then I collapsed, eventually blacked out and then was rushed (...) to hospital unconscious in an ambulance with them struggling drastically to keep me alive. Af ter three days of being in there, they thought I was alright and were going to send me home. Then it star ted happening. First I nearly collapsed again tak ing a shower . For days the spe - cialists didn’t k now what was wrong with me. M y girlfriend at the time, who had rushed down from Wanak a when she had heard it had happened went mad at the specialists to do something. Af ter six days of going in and out of seizures, finally af ter what seemed like all the tests k nown to man, they said I had suffered several brain stem strokes then one massive major one, which altogether had lef t me diagnosed with the ex tremely rare and unk nown condition only k nown to a few as “ locked in syndrome”. (shrink)

Spin gauge models use a real Clifford algebraic structure Rp,q associated with a real manifold of dimension p + q to describe the fundamental interactions of elementary particles. This review provides a comparison between those models and the standard model, indicating their similarities and differences. By contrast with the standard model, the spin gauge model based on R3,8 generates intermediate boson mass terms without the need to use the Higgs-Kibble mechanism and produces a precise prediction for the mass of the (...) top quark. The potential of this model to account for exactly three families of fermions is considered. (shrink)

We show that for every computable limit ordinal α, there is a computable structure A that is $\Delta _\alpha ^0 $ categorical, but not relatively $\Delta _\alpha ^0 $ categorical (equivalently. it does not have a formally $\Sigma _\alpha ^0 $ Scott family). We also show that for every computable limit ordinal a, there is a computable structure A with an additional relation R that is intrinsically $\Sigma _\alpha ^0 $ on A. but not relatively intrinsically $\Sigma _\alpha ^0 $ (...) on A (equivalently, it is not definable by a computable $\Sigma _\alpha $ formula with finitely many parameters). Earlier results in [7], [10], and [8] establish the same facts for computable successor ordinals α. (shrink)

BIBLIOGRAPHY OF RODERICK M. CHISHOLM 1941 (a) 'Sextus Empiricus and Modern Empiricism', Philosophy of Science VIII, 371-384. 1942 (a) 'The Problem of the Speckled Hen', Mind u, 368-373. 1943 (a) Review of 'Lewin's Topological and Vector ...

This critical examination of Roderick Chisholm's agent causal brand of libertarianism develops a problem about luck that undermines his earlier and later libertarian views on free will and moral responsibility and defends the thesis that a modest libertarian alternative considerably softens the problem. The alternative calls for an indeterministic connection in the action-producing process that is further removed from action than Chisholm demands. The article also explores the implications of a relatively new variant of a Frankfurt-style case for Chisholm's views (...) of free will and moral responsibility and for libertarianism in general. It is suggested that Chisholm's efforts will and should continue to offer important assistance to libertarians who are determined to succeed where he apparently fell short. (shrink)

The "problem of counterfactuals," as proposed by Goodman and Chisholm, cannot be solved. However, a similar program, pioneered by Hiż and Mrs. Milmed, but largely neglected, can be completed and promises a satisfactory analysis of subjunctive conditionals.

In this paper, I relate key features of Adolf Reinach’s abundant ontology of propositional states of affairs of his to Armstrong’s—or an Armstrongian—state of affairs ontology, with special regard to finding out how sparse or abundant the latter is with respect to negative states of affairs. After introducing the issue, I clarify the notion of a propositional state of affairs, paying special attention to the notion of abstract versus concrete. I show how Reinach’s states of affairs are propositional, and how (...) they compare with Chisholm’s well-known propositional states of affairs. In the next section, I outline Reinach’s five roles for states of affairs and show that only one of them is relevant to Armstrongian state of affairs ontology. In the following section, I utilise this role to create a ranking of state of affairs ontologies according to how abundant they are. It is, however, unclear which level Armstrongian state of affairs ontology is at, since it is unclear if, like Reinach’s ontology, it includes negative states of affairs. In the final section, I argue that the answer is a qualified ‘yes’, i.e. it does not occupy the sparsest level. (shrink)

The following statement is a report of the Committee on Philosophy in Education of the American Philosophical Association and was approved by the Association's Board of Officers in December, 1958. The Committee was composed of the following: C. W. Hendel, Chairman, H. G. Alexander, R. M. Chisholm, Max Fisch, Lucius Garvin, Douglas Morgan, A. E. Murphy, Charner Perry and R. G. Turnbull. Primary responsibility for the preparation of this report belonged to a subcommittee composed of R. G. Turnbull, Chairman, and (...) C. W. Hendel. (shrink)

pt. 1. De dicto: Necessary and contingent truths, by G. W. Leibniz. New essays concerning human understanding, by G. W. Leibniz. Introduction to the critique of pure reason, by Immanuel Kant. On the nature of mathematical truth, C. G. Hempel. Two dogmas of empiricism, by W. V. O. Quine. In defense of a dogma, by H. P. Grace and P. F. Strawson. The a priori and the analytic, by A. Quinton. The truths of reason, by R. Chisholm.--pt. 2. De re: (...) Reference and modality, by W. V. O. Quine. De re et de dicto, by A. Plantinga. World and essence, by A. Plantinga.--Bibliography (p. 200-202). (shrink)

One merit claimed for john rawls's coherence method, Wide reflective equilibrium, Is that it transcends the traditional two tiered approach to moral inquiry according to which one must choose as one's starting points either particular moral judgments or general moral principles. The two tiered conception of philosophical method is not limited to ethics. The most detailed exposition of the conception can be found in r m chisholm's various discussions of the problem of the criterion. While chisholm's work has played a (...) major role in structuring the way epistemologists think about method, It has not similarly influenced the deliberations of moral theorists. But moral philosophers are not the only ones with myopia, For neither rawls's coherentist method nor classical moral intuitionism figure in chisholm's taxonomy. One aim is to correct the vision of both parties by expanding chisholm's taxonomy in order to make clear how intuitionism and rawls's coherentist method are related to the methods identified by chisholm. My other aim is to argue for coherentism of the sort defended by rawls against the other non-Skeptical methods I consider. (shrink)

This is an extremely well-edited collection of articles dealing with Austin. A number of articles help to present general biographical information and to provide an overview of the man and his philosophic style. Three sections of this anthology are divided so as to include papers that deal with issues raised in Austin's Philosophical Papers, Sense and Sensibilia, and How to Do Thing with Words. Papers are included by those who are sympathetic and admire Austin's work as well as those who (...) have been very critical of his work. Altogether this symposium includes a judicious selection of some of the best articles dealing with Austin. There are papers by Warnock, Urmson, Hampshire, Pears, Cavell, Quine, Chisholm, Ayer, Searle, etc. There is a bibliography of Austin's writings as well as writings about Austin.--R. J. B. (shrink)

Chisholm's lucid and subtle introduction enables one to understand a wide diversity of selections as well as the import of contemporary realism. Several selections from Brentano, Meinong and Husserl are translated for the first time. The bibliography is the best and most complete we have in English.--R. J. B.

In his book, Theory of Knowledge , Roderick Chisholm distinguishes very precisely between, amongst others, what he calls acceptable, reasonable and evident propositions. A proposition is acceptable if with-holding it is not more reasonable than believing it; a proposition is reasonable if believing it is more reasonable than with-holding it; and a proposition is evident for a person provided it is reasonable for him, and there is no other proposition such that the latter is more reasonable than the former. The (...) notion of being more reasonable is obviously pivotal, and Chisholm explains what it is for an attitude to be more reasonable than another in the following words: “If the person in question were a rational being, if his concerns were purely intellectual, and if he were to choose between the two attitudes, then he would choose the more reasonable in preference to the less reasonable”. The wording of this conditional suggests that Chisholm does not think a person is necessarily rational, so it is imperative that we ask: When is a person rational? (shrink)

This volume contains papers from a 1962 Symposium in the Philosophy of Mind held at Wayne State University. There are seven essays, each accompanied by lengthy and usually quite astute comments, and followed by a shorter rejoinder. Chisholm contributes a refinement of his much discussed criteria for intentional connectives: "On Some Psychological Concepts and the 'Logic' of Intentionality." The scare quotes are well-placed around "Logic," as it is Chisholm's intuitive rather than formal logical perspicacity which carries the weight of the (...) argument. Ayer's paper, "The Concept of a Person," has already been published in his book of the same name. The most deliberate exercise in epistemic logic is Castañeda's paper, "Consciousness and Behavior: Their Basic Connections." This essay deserves close scrutiny, as it represents a disciplined attempt to rehabilitate more traditional conceptions of consciousness and, particularly, self-consciousness. Putnam has some more to say about minds and machines in "The Mental Life of Some Machines." In what is possibly the best paper in the volume, Sellars develops the dialectic that runs from phenomenalism, through various forms of realism, to a critical scientific realism mediated by a Kantian-style phenomenalism. Aune's comments on the paper are very illuminating. Alston, owing to the delay in publication of the Symposium, joins a bit late the list of those who are criticizing and rejecting the logical barrier between reasons and causes that has been erected by Melden et al. Finally, Firth tries to delimit our concept of seeing by arguing in a manner more suggestive than definitive for causal criteria for the use of the term. The general tone of the volume is exploratory.—E. A. R. (shrink)

This is an extremely well-edited collection of articles dealing with Austin. A number of articles help to present general biographical information and to provide an overview of the man and his philosophic style. Three sections of this anthology are divided so as to include papers that deal with issues raised in Austin's Philosophical Papers, Sense and Sensibilia, and How to Do Thing with Words. Papers are included by those who are sympathetic and admire Austin's work as well as those who (...) have been very critical of his work. Altogether this symposium includes a judicious selection of some of the best articles dealing with Austin. There are papers by Warnock, Urmson, Hampshire, Pears, Cavell, Quine, Chisholm, Ayer, Searle, etc. There is a bibliography of Austin's writings as well as writings about Austin.--R. J. B. (shrink)

The essays in philosophical logic collected in this volume are dedicated to Henry S. Leonard who was one of the first American philosophers to urge the application of modern logic to non-mathematical areas. Leonard also inspired the development of certain areas of contemporary philosophical logic discussed in some of the papers of this volume. This is especially clear in the case of free, or presupposition free, logics which Leonard's early work on a logic of existence inspired. In one essay of (...) this volume Bas C. Van Frassen further develops his work on the semantics of free logic. In another, Milton Fisk relates free logic to modal logic, suggesting a new semantics of strength to deal with various problems in the area and in a third essay, Karel Lambert relates free logic to certain logical puzzles about quantum theory. Leonard was also one of the first to entertain the idea of and discuss a logic of questions and an erotetic logic or logic of interests. The volume contains essays on these topics by Nuel D. Belnap and David Harrah. Leonard's interest in modal logic is reflected in Fisk's article as well as in an article by Richmond Thomason on modal logic and metaphysics. His interest in epistemic logic is seen in an essay on the logic of belief by Jon Vickers and an essay by Hintikka applying the logic of belief and knowledge to problems about the ontological argument. In addition to these essays, there are five others of high quality on diverse topics: R. M. Martin on intentions, Wilfrid Sellars on the metaphysics of the person, R. M. Chisholm on agency, Frederick Fitch on combinatory logic and negative numbers, and H. E. Hendry and G. J. Massey on Sheffer functions. This is a worthy memorial to a quietly influential American philosopher.--R. H. K. (shrink)

For some of us, the defeasibility theory of knowledge remains the most plausible approach to the Gettier Problem. Epistemological fashion and faded memories notwithstanding, persuasive objections to the theory are very hard to find. The most impressive of those objections to the theory that have hitherto gone unanswered are examined and rejected here. These are objections put forward by Richard Feldman, Richard Foley, and John Turri. While these are all interesting, the objection recently put forward by Turri is, we think, (...) by far, the most serious threat to the theory that we have seen in a long time. A successful reply to it requires a surprising amount of care, as it turns out. If tenable, Turri's objection deals a devastating blow to the theory developed by Roderick Chisholm, Keith Lehrer, Peter Klein, Marshall Swain, Risto Hilpinen, John Pollock, and Paul Moser, among others. Under scrutiny, however, the threat proves illusory. It results from inattention to a crucial, but relatively subtle, aspect of.. (shrink)

This volume contains papers from a 1962 Symposium in the Philosophy of Mind held at Wayne State University. There are seven essays, each accompanied by lengthy and usually quite astute comments, and followed by a shorter rejoinder. Chisholm contributes a refinement of his much discussed criteria for intentional connectives: "On Some Psychological Concepts and the 'Logic' of Intentionality." The scare quotes are well-placed around "Logic," as it is Chisholm's intuitive rather than formal logical perspicacity which carries the weight of the (...) argument. Ayer's paper, "The Concept of a Person," has already been published in his book of the same name. The most deliberate exercise in epistemic logic is Castañeda's paper, "Consciousness and Behavior: Their Basic Connections." This essay deserves close scrutiny, as it represents a disciplined attempt to rehabilitate more traditional conceptions of consciousness and, particularly, self-consciousness. Putnam has some more to say about minds and machines in "The Mental Life of Some Machines." In what is possibly the best paper in the volume, Sellars develops the dialectic that runs from phenomenalism, through various forms of realism, to a critical scientific realism mediated by a Kantian-style phenomenalism. Aune's comments on the paper are very illuminating. Alston, owing to the delay in publication of the Symposium, joins a bit late the list of those who are criticizing and rejecting the logical barrier between reasons and causes that has been erected by Melden et al. Finally, Firth tries to delimit our concept of seeing by arguing in a manner more suggestive than definitive for causal criteria for the use of the term. The general tone of the volume is exploratory.—E. A. R. (shrink)

The virtue of this book is that it is about as exhaustive of the contemporary analytical sources as could be reasonably demanded. Selections from Strawson, Ayer, Austin, Russell, Chisholm, and Malcolm abound. Many staples in the literature show up here: "On Referring," "On Denoting, "On Sense and Nominatum," "On What There Is," "Problems and Changes in the Empiricist Criterion of Meaning," to mention only a few. Their inclusion in one volume is tarnished a bit, however, by the fact that most (...) of them are edited. The ten topics covered are the conventional ones and include "Meaning," "Truth," "Universals," "Induction," and "Knowledge of Other Minds." Adequate bibliographies are provided at the end of each section. The undergraduate student should be exposed to more perspectives on epistemological issues than are contained in this volume; but for the philosophical approach it emphasizes, it is admirable for its structure and comprehensiveness.—E. A. R. (shrink)

Selections from "twentieth century sources" which include Moore, Broad, Price, Paul, Lewis, Chisholm, and Warnock. Sense data and phenomenalism are the most heavily represented topics. The choice is substantial, and the editor has skillfully arranged selections in pairs which take up opposite sides of the same problem. This appears to be the best buy in paper on this subject.—E. A. R.

Starting from the problem of the Theaetetus, i.e., the problem of distinguishing knowledge from true opinion, Chisholm proceeds in a sober and meticulous fashion to detail and suggest avenues of approach to the gamut of traditional and contemporary epistemological problems. A theory of degrees of certainty from the directly and indirectly evident through the reasonable to the acceptable is developed in line with Chisholm's empiricist and perception-centered approach to epistemology. The notion of the directly evident, or the "given," as it (...) has been styled, is cautiously but firmly defended, as is Chisholm's version of "Brentano's Thesis." Other individual chapters are given over to the analytic/synthetic distinction, truth, and the status of appearances. Since it is in Prentice-Hall's Foundations of Philosophy Series and is designed for use in undergraduate courses, the book could have used a more extensive and systematically presented bibliography than what can be culled from the footnotes—especially since Chisholm is in continual but formally unacknowledged dialogue with other contemporary analytical philosophers.—E. A. R. (shrink)

Roderick Chisholm provides, in different places, two formulations of Brentano's thesis about the relation between the psychological and the intentional: (1) all and only psychological sentences are intentional; (2) no psychological intentional sentence is equivalent to a nonintentional sentence. Chisholm also presents several definitions of intentionality. Some of these allow that a sentence is intentional while its negation is nonintentional, which ruins the prospects of defending the more plausible and interesting thesis (2). A generalization of the notion of logical independence (...) to any number of mutually independent sentences permits a revision of Chisholm's criteria of intentionality that ensures that a sentence is intentional on a criterion exactly when its negation is as well. (shrink)

Two general approaches to the analysis of knowledge are distinguished: a liberal view that takes the truth of what is known as a condition independent of the justificatory condition, and a conservative view that regards the truth of what is known as implied by the level of justification required for knowledge. Chisholm is classified as a liberal on perceptual knowledge, and his analysis is criticized from a conservative standpoint.

Chisholm's theory of freedom implies that a free action necessarily is one that has a certain causal history, Namely one leading back to a brain event (or some similar physiological occurrence) made to happen by the agent. The problem arises of the conceivability of the relation that is supposed to exist, On this theory, Between the agent and the bodily events leading up to his behavior. Furthermore, If it is a contingency whether human beings are sometimes free or always determined, (...) Then chisholm's formulation of the problem of freedom contains an assumption that may be unjustified, Namely that human beings are "responsible agents" in the sense that their free actions necessarily have a certain indeterministic history. It may be an empirical fact that every human action in fact has a sufficient causal condition. (shrink)

The problem of intentionality, or how mind and language can take things in the world as “intentional objects,” engaged Chisholm throughout his philosophical career. This essay reviews and discusses his seminal contributions on this problem, from his early work in “Sentences about Believing” and Perceiving during the 1950s to his last and most mature account in The First Person, published in 1981. Chisholm's final view was that de se reference, or a subject's directly taking himself as an intentional object, is (...) fundamental and primitive, and that all other forms of intentional reference, such as de re and de dicto, can be understood on the basis of de se intentionality. The essay ends with a discussion of the worry that this account might lead to what may be called “intentional solipsism,” the proposition that the self is the only genuine object of intentional reference. (shrink)

In the following we shall see, however, that Chisholm’s interpretation of Brentano’s intentionality doctrine is not wholly accurate, and that while the doctrine he sets forth as Brentano’s is an interesting and provocative one, it gives a misleading impression of what Brentano’s views actually were, by obscuring almost entirely the specific nature of the question Brentano was trying to solve, and by misreading the answer Brentano gave. If only for the sake of historical accuracy a corrective should be given, but, (...) of course, taking another look at Brentano’s particular way of construing the mind/body problem and the solution he put forth may also prove to be suggestive in its own right. (shrink)

The article provides a critical overview of the main theses contained in the book The First Person by Roderick Chisholm. Chisholm's main thesis is that of the priority of the reference de se over reference de re. Chisholm develops firstly a theory of properties according to which these must be able to remain unexemplified. This excludes from the outset that we can reinterpret the indexical term “I” (the first person) in the sense of a property, since an indexical term always (...) refers to an existing particular object, so that the property in question would necessarily be exemplified. The sentences relating to the first person (de se) are not propositions but attributions, from which one can derive both the sentences de re as well as sentences de dicto (intentional attitudes). These sentences can have as subjects persons other than the “I”. (shrink)

A NUMBER of things are immediately striking about Roderick Chisholm’s way of doing philosophy. He is an analytic philosopher who is quite ready to cite at some length such diverse thinkers as Thomas Aquinas, Franz Brentano, Alexius Meinong, and Edmund Husserl. He unabashedly calls much of his work "metaphysical." His sources and conclusions mark him as something of a maverick, but his philosophical style is quintessential contemporary American establishment. These crosscurrents seem at least potentially exciting. They promise a richness of (...) perspective as well as exactness and clarity in argument. It has become commonplace to deplore the lack of dialogue among the main philosophical "schools" of this century—the analysts, the phenomenologists, etc. In Roderick Chisholm America has produced a philosopher who has consistently refused isolationism even when it has seemed hopelessly fashionable. (shrink)