We question the usefulness of Pylyshyn's dichotomy between cognitively penetrable and cognitively impenetrable mechanisms as the basis for his distinction between cognition and early vision. This dichotomy is comparable to others that have been proposed in psychology prompting disputes that by their very nature could not be resolved. This fate is inevitable for Pylyshyn's thesis because of its reliance on internal representations and their interpretation. What is more fruitful in relation to this issue is not a difficult dichotomy, but a (...) different look at perception such as proposed by Gibson (1979). (shrink)

Dr. Cyril Bailey and Dr. C. M. Bowra have most recently analysed Virgil's method of using the expressions of Lucretius and Ennius respectively, and Mile A.-M. Guillemin has lately added significant considerations to Father F.-X. M. J. Roiron's long examination of Virgil's method of using again his own former expressions. Since then other work has been done with the purpose of clarifying the less rational part of Virgil's self-repetition; it might be called complementary to the well-known researches of Mr. John (...) Sparrow. With such a purpose I have tried to suggest how Virgil reached the strange phrase in the first Eclogue, rapidum Cretae, or cretae, Oaxen, by a not unparalleled confusion of the names of several different rivers and at least one town. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Place and the "Spatial Turn" in Geography and in HistoryCharles W. J. WithersI. IntroductionA few years ago, British Telecom ran a newspaper advertisement in the British press about the benefits—and consequences—of advances in communications technology. Featuring a remote settlement in the north-west Highlands of Scotland, and with the clear implication that such "out-of-the-way places" were now connected to the wider world (as if they had not been before), the (...) advert proclaimed "Geography is History." What the advert signalled to as the "end" of geography in the sense of the social gradients associated with space and distance is what is known, variously, as "time-space convergence" and "time-space distanciation."1 The terms embrace not just the "collapse" of geographical space given technical advances (in travel time and in communications—consequences of what Castells calls "the information age" and "the network society"2), but also the idea that the modern world has become [End Page 637] more homogenized. One place is now much the same as another. Further, given the likelihood of such technical and cultural changes continuing into the future, geographical distinctiveness, evident in the particularity of place, would be a thing of the past: geography would indeed be history. There is, of course, much evidence to the contrary: that, in the face of "globalisation," questions of locality, sense of place and of identity in place matter now more than ever. Even, then, as Francis Fukuyama cautioned against the "death" of liberal democratic politics as The End of History,3 geography—that is, geography understood as questions to do with place, and questions to do with where you are in the world as part of questions about how you are and who you are in the world—has had considerably heightened significance and for some places and people more than others.4These notions of place—as a particular location, and the character or sense of place—are only part of the meanings associated with place in geographical and in historical work. Like space, its regular epistemic dancing partner in geographical ubiquity and metaphysical imprecision, place is a widespread yet complex term. What follows is historiographical in focus and, of necessity, partial in range. I offer a historiographical survey of the term place, principally but not alone within recent work in geography. In more detail, and with reference to one of the strong senses in which place is used, namely that of locale, "the local," or localness, I trace here the connections between place, space, and the idea of the local as evident in recent work in history and in geography, especially within the history and the geography of science. Particular attention is paid in this context to the distinctive features of what we may think of as the "spatial turn" in the history of science by looking at the idea of place and space in recent work in Enlightenment studies. My argument is three-fold. Notions of place and space, much debated by geographers, have been as central a concern for intellectual historians and historians of science as for philosophers and others, but they have been differently expressed. There is, I shall argue, value in looking at these different views in order to understand that whilst place is a commonplace term it is not agreed upon: working with imprecision has been both opportunity and restriction. In relation to work within the history of science and in Enlightenment studies, consideration of the so-called "spatial turn," of place [End Page 638] as social practice and of placing as a process in accounting for the uneven movement of ideas over space and time may help provide some precision and strengthen connections between geography and history.II. Place (In Geography): A Partial HistoriographyPlace is one of the most fundamental concepts in human geography. It is also one of the most problematic.5 Place, or small-scale regional space, features as a subdivision within the Classical tripartite division of cosmography (the earth in relation to other planetary bodies), geography (the earth as a whole) and chorography (parts of the earth or regional geography). So, too, does the distinction between chorography and chronology as... (shrink)

W. J. Mander presents the first ever synoptic history of British Idealism, the school of thought which dominated English-language philosophy from the 1860s to the early 20th century. He restores to its proper place this neglected period of philosophy, introducing the exponents of Idealism and explaining its distinctive concepts and doctrines.

F. H. Bradley did not write extensively or systematically on the philosophy of religion, and much of what he did write has the character of either tentative speculation or the pre-emptive rebuttal of potential misinterpretations that might threaten his general philosophical position. ‘I admit that on this subject I never had much to say’ he warns. But such a remark should not discourage us from considering his views on this topic, since the disclaimer is typically Bradleian, and more reflective of (...) his high standards for what is required in order to claim to have something to say about some matter than of any genuine lack of opinion. On closer inspection we find that he has, scattered throughout his work, a great many important things to say about this subject. (shrink)

What precisely, W. J. T. Mitchell asks, are pictures (and theories of pictures) doing now, in the late twentieth century, when the power of the visual is said to be greater than ever before, and the "pictorial turn" supplants the "linguistic turn" in the study of culture? This book by one of America's leading theorists of visual representation offers a rich account of the interplay between the visible and the readable across culture, from literature to visual art to the mass (...) media. (shrink)

W. J. Mander provides a brief introduction to and critical assessment of the thought of the greatest of the British Idealist philosophers, F. H. Bradley (1846-1924), whose work has been largely neglected in this century. After a general introduction to Bradley's metaphysics and its logical foundations, Mander shows that much of Bradley's philosophy has been seriously misunderstood. Mander argues that any adequate treatment of Bradley's thought must take full account of his unique dual inheritance from the traditions of British empiricism (...) and Hegelian rationalism. The scholarship of recent years is assessed, and new interpretations are offered of Bradley's views about truth, predication, and relations, and of his arguments for idealism. (shrink)

W. J. Mander examines the nature of idealist ethics, that is to say, the form and content of ethical belief most typically adopted by philosophical idealists. His inquiry has two aims. The first is historical: from the record of past philosophy, Mander demonstrates that there exists a discernible idealist approach to moral philosophy; a tradition of 'idealist ethics', and examines its characteristic marks and varieties. The second aim is apologetic. He argues that such idealist ethics offers an attractive way of (...) looking at moral questions and that it has much to contribute to contemporary discussion. In particular he argues that Idealist ethics have the power to cut through the sterile opposition between moral realism and moral anti-realism. To be an idealist is precisely to hold that the universe is so constituted that things are real if and only if they are ideal; to hold that uncovering in something the work of mind makes it more not less significant. (shrink)

This paper is based on Lectures 1, 2 and 4 in the series of ten lectures titled “Algebraic Structures for Logic” that Professor Blok and I presented at the Twenty Third Holiday Mathematics Symposium held at New Mexico State University in Las Cruces, New Mexico, January 8-12, 1999. These three lectures presented a new approach to the algebraization of deductive systems, and after the symposium we made plans to publish a joint paper, to be written by Blok, further developing these (...) ideas. That project was still incomplete when Blok died. In fact, there is no indication that he had prepared a draft of the paper, and we do not know what new material he intended to include. I am therefore not in a position to complete the project as he had envisioned it. So, I have settled for the more limited objective of presenting the material from the three lectures, leaving to others the task of adapting the techniques used there to more general situations. (shrink)

Through clear explanation of its characteristic concepts and doctrines, and paying close attention to the published works of its philosophers, the volume ...

continent. 1.2 (2011): 129-135. Introduction Vincent W.J. van Gerven Oei Successions of words are so agreeable. It is about this. —Gertrude Stein Nachoem Wijnberg (1961) is a Dutch poet and novelist. He also a professor of cultural entrepreneurship and management at the Business School of the University of Amsterdam. Since 1989, he has published thirteen volumes of poetry and four novels, which, in my opinion mark a high point in Dutch contemporary literature. His novels even more than his poetry are (...) criticized for being inaccessible, which I generally take to be a compliment. It would be like saying that Fernando Pessoa is inaccessible, which he is not. Neither is Wijnberg. When we think of the combination economist-poet we are immediately reminded of the American poet Wallace Stevens, who, as the story goes, had two stacks of paper on his desk, one for contracts, one for poems. We also know that Stevens wrote on the economy and that questions of economy and insurance surface at multiple points in his poems. The following text is a very preliminary attempt to point at the intersections between poems, novels, business, and poetry in Wijnberg’s work. On the back cover of his novel De opvolging ( The Succession , 2005), Wijnberg states the following: “[This is] a novel for whomever is interested in the workings of a company as much as in the workings of a poem.” Wijnberg thus claims that the way in which a company “works” may be similar to the way in which a poem “works.” The question is the obvious one, what does this similarity consist in? De opvolging tells the story of company in which bosses and company doctors, secretaries, children, clowns, and beggars have tons of meetings, recite poems, perform plays, tell jokes, and succeed each other, climbing up and down in the company’s hierarchy. De opvolging is a novel in which the career of people follows the career of words. It resonates with Gertrude Stein's sentences, "Grammar. What is it. Who was it" (1975, 50). The words in Wijnberg's poems are like he characters in his novel. And if we keep in mind this allegorical reading of De opvolging , which is obviously only one of the possible readings, we may be able to understand some aspects of Wijnberg’s poetry. A repetition is already a pun. Look, that word is trying it again, as if it is afraid that by not doing it it would give up the hope that it will ever be able to do something. A pun is the opposite of the first word coming to the mind of someone who shouts it when he suddenly discovers something. (104) The repetition, the succession of the same word, is already a pun, a joke. The succession of the father by the son after the revolution is a joke. "Look he's trying it again!" The essence of a joke is a repetition. Archimedes’ “Eureka!” is its opposite. Poems can easily become jokes, depending on the way the words follow and repeat each other. In De opvolging , the careers of the bosses, good and bad secretaries, and company doctors easily become jokes, as they are “afraid that by not doing it [they] would give up the hope that [they] will ever be able to do something.” Not only the repetition, but also the distance and difference between the words in a poem, their cause and effect relations can be read as company relations. This becomes clear when we, for example, read the first lines of the poem “Cause, sign” from Het leven van ( The Life Of , 2009). A sign lets know what is going to happen, a cause lets it happen. If the sign also lets happen there is no reason to isolate it, because then I would isolate some- thing only because it’s different for me. If I didn’t have to write this myself, but would have secretaries to whom I could dictate it, I would be able to say more about it. (49) Upon reading the first two lines we can already conclude that any word may be cause or sign or both. If a sign is also a cause there is no reason to discriminate it, yet to the poet they are still different. This difference only becomes expressible the moment he would have a secretary. Just like in De opvolging , the secretary introduces a distance; not in a company but in a poem. Hence the difference between “good” and “bad” secretaries in a company, where the good secretary of one boss may be the bad secretary of another one. The more we can say about the bosses of the company, or signifiers of the poem, the greater the distance we introduce between them and us. We should take serious the relation between Wijnberg’s novels and poems. Although they operate on different scales, they explain and converse with each other. Another example may be the novel Politiek en liefde ( Politics and Love , 2002), which deals with the relation, precisely, between politics and love. In the novel, Nicolai, a lieutenant in the Dutch army, is sent to Africa on a military mission. Upon leaving a receives a letter from his father. Dear son, Don’t do anything stupid before your father has advised you to do so. Your mother asked me to write a wise letter. I have been looking for wisdom for half a day and haven’t found much. If you borrow a small amount from a bank you become the bank’s slave, but if you borrow a couple of millions and spend them as quickly as possible the bank becomes your slave. What I want to say is that you have to return from Africa in good health, and before you know it the world will be your slave [....] Signed with a kiss from your father. (88) The line, “If you borrow a small amount from a bank you become the bank’s slave, but if you borrow a couple of millions and spend them as quickly as possible the bank becomes your slave,” returns as the title of poem in Het leven van: “If I borrow enough money the bank becomes my slave” (12-3), which elaborates this theme. So both in the way that these poems are structured and in their subject matter, they refer to the structures of our economy, to the ever-continuing line of CEOs succeeding each other like words, to the distance between them introduced by bureaucracy, and giving and receiving as economical and poetical acts. Poem and economy map onto each other, as in another episode from De opvolging : Edward reads two of the beggar’s poems about presents. Of a holiday nothing remains, except for memories, and if some of them are bad I’d rather forget them all; if I get a present I’d rather get something that’s useful to me for a long time. If I may choose, I choose what I can use longest, long enough to partially forget that this was the present, because it feels bad when nothing is left of it. […] Giving away becomes destruction in the stock destruction economy [ voorraadvernie -tigings-economie ], that is a gift economy [ geschenkeneconomie ], encountering for the first time an economy in which there’s selling and buying on markets. Instead of destroying supplies someone can also quickly say that they aren’t worth anything anymore; if someone wants to take them I’d gladly give him something extra. In a stock destruction economy he is someone who each day wants to work more hours than his colleagues. If around a company there is a gift economy in which someone’s rank is determined and made visible by the gifts someone can give someone else, a company will be more often character- ized by an invisible or unclear system of ranks. (152) Two poems about gifts present two different economical models, described by Wijnberg with the terms “stock destruction economy” and “gift economy.” Here we immediately recall the opposition introduced by George Bataille’s work on the concept of expenditure in The Accursed Share , where a “general economy” would surpass the stock destruction economy based on scarcity (capitalism) and become a gift economy (potlatch) and an egalitarian (communist) society. These claims are made both on the level of the poems and in their discursive explanation. They follow each other and on each other. I would like to finish this introduction to Wijnberg’s writing with a translation from his novel De joden ( The Jews , 1999), which develops the story of Hitler abdicating as chancellor of the Third Reich, appointing philosopher Martin Heidegger as his successor. In a conversation with two Russian actor-spies, sent by Stalin to figure out the situation, philosopher Walter Benjamin describes the abdication scene. Maimon: You were there when Hitler resigned? Benjamin: In the room we’re right now. The desk and the chairs are new. After his resignation Hitler would like to take his furniture to his new house. Martin naturally agrees. It is a sunny day. Martin is very nervous and complains about the heat. Martin is wearing his best dark blue suit, not his professor’s robe. Hitler is wearing his uniform. We enter the room and Hitler gets up and embraces Martin. Martin is not very good at embracing. Hitler shakes his hand. Hitler’s cap is on the desk. The cap has a metal lining. Hitler has strong neck muscles. Hitler says: A man is unclean. He takes a bath. Does he make the bath water unclean? I say: a man is unclean. He steps into a river. A little further a man steps into the river; does he become unclean? Hitler nods. I say: a man is standing in music. Another man hears the music but also sees the first man moving on the beat of the music in a way that he is certain that the music would excite different feelings in him if he wouldn’t to see the first man. Hitler says: a man is clean, listens to music, is suddenly touched and he doesn’t know by what. The conversation ends in the way you know it ends. Hitler picks up his cap from the desk and puts it on Martin’s head. (73-4) Aware of the never ending debate on the question of Heidegger’s involvement in the Nazi regime, Wijnberg has the audacity to present the arguments of complicity in the religious terminology of cleanliness and uncleanliness, while at the same time recalling overtones of Hitler’s supposed love for Wagner, suggesting a relation between Benjamin and Hitler, and so on. The space of this introduction is to small to treat a novel like De joden , a reading of which together with passages from Philippe Lacoue-Labarthe's Heidegger, Art, and Politics: The Fiction of the Political , Jacques Derrida's Of Spirit , Christopher Fynsk's Heidegger: Thought and Historicity , and Avital Ronell's The Telephone Book would be extremely elucidating and potentially open new avenues in thinking Heidegger's emphasis on poetry after the fall of the Nazi empire. But at this point we will have to curb our curiosity and follow the poet himself. The themes of the relation between business and poetry, but also Chinese landscape painting, love, Indian and Japanese poetry, and Western philosophy are analyzed and assimilated in Wijnberg’s work without ever losing the clarity of expression. It may be that, according to Alain Badiou, the “Age of the Poets” is over, but its end (Paul Celan) has exactly brought a new balance between philosophy and poetry, and it is this playful, but nonetheless serious balance that makes one hope that one day Wijnberg’s complete oeuvre might become available to readers across the planet. Tiranë, Albania February 15, 2011 English translations (all of them translated by David Colmer, who is preparing an English collection of Wijnberg’s poems entitled Advanced Payment ): Poetry International Words Without Borders Green Integer Review from Het leven van ( The Life of ) THE LIFE OF KANT, OF HEGEL As if every day he takes a decision that is as good as when he’d been able to think about it all his life. The life of Kant, of Hegel, the days of the life of, select three or four of them. Tell what he has discovered during those days as if he were the last one who knew so little. Give me something that I can cancel against then I can prepare myself for it. The reward is that I may continue with what I’m doing, it doesn’t matter how long it takes. This has nothing to do with everything remaining the same if I say that I no longer want anything else. I wouldn’t be able to say in which one and the other occur in a way that I if I knew something to cancel that one against it wouldn’t be possible now. The stars above my head and being able to say what belongs to what if I’ve let them in. FOLLOWING MY HEART WITHOUT BREAKING THE RULES Observing the rules without observing the rules by going where the rules no longer apply. I could also observe the rules there by applying them to what at great distance may resemble what the rules are about. But why would I do that, not to confuse someone who is seeing me from a great distance? Behind this morning the morning prepares itself when the rules are everything I have. IF I BORROW ENOUGH MONEY THE BANK BECOMES MY SLAVE A bank lends me money, if I don’t pay it back they tell my boss that he has to pay them my salary. But they have to leave me enough to eat and sleep and an umbrella when it’s raining. They can also empty my house, the furniture isn’t worth a lot, but every little helps. Each morning I leave for work, if I don’t start early they’ll soon get someone else, no bank will lend me money when the sun is shining. My boss has given me a cat to raise as a dog. Of course I know that it won’t work out, but I’ve asked for a week—maybe the cat gets lucky, maybe I get lucky. My hands around a cup of coffee, before I leave for work, warm-empty, cold-empty, as if hidden in the mist over a lawn. What I make when there’s no work left for me, I’m ashamed to say how little it is. Once I’m outside I check it, if they watch out of the window they can see me doing it. Suppose it is so much that I’d stay counting for hours, it’s getting dark and I’m still there. They stay watching for a while once they’ve finished their work, but have to go home, I get that, sure, I could also go home and continue counting there. If it’s too little running back immediately won’t help, because nobody’s there anymore, and if I come back tomorrow I may have spent what’s missing tonight. Going somewhere where it’s warm enough to walk around without clothes during daytime, it helps me to know that something’s more there than here. For someone like me there’s work anywhere, it shouldn’t take a week to find work for me there. Three times work and a home close to work, I may choose one and try for a week whether I want to stay there. If at the end of the week I don’t want to stay I’m back on the next day, then it was a week’s holiday. RULES If that’s against a rule, it’s yet another one that I cannot observe, or only so briefly that I cannot re- member it later. Anyways the rules are only there to help me remember what I need in order to do better what I do. In that respect there’s no difference between the rules that I find in a book and the rules that I think of early in the morning. I know that because I’ve made a rule just now nothing has yet to observe it. CAUSE, SIGN A sign lets know what is going to happen, a cause lets it happen. If the sign also lets happen there is no reason to isolate it, because then I would isolate something only because it’s different for me. If I didn’t have to write this down myself, but would have secretaries to whom I could dictate it, I could to say more about it. If something is taken away from me I consider how it would be if the opposite had been taken from me. That is what causes or signifies what is farthest away from what is caused or signified by what has been taken away from me. note: For the translations of “The life of Kant, of Hegel” and “If I borrow enough money the bank becomes my slave” I was able to consult David Colmer’s wonderful translations. (shrink)

There exist important deductive systems, such as the non-normal modal logics, that are not proper subjects of classical algebraic logic in the sense that their metatheory cannot be reduced to the equational metatheory of any particular class of algebras. Nevertheless, most of these systems are amenable to the methods of universal algebra when applied to the matrix models of the system. In the present paper we consider a wide class of deductive systems of this kind called protoalgebraic logics. These include (...) almost all (non-pathological) systems of prepositional logic that have occurred in the literature. The relationship between the metatheory of a protoalgebraic logic and its matrix models is studied. The following results are obtained for any finite matrix model U of a filter-distributive protoalgebraic logic : (I) The extension U of is finitely axiomatized (provided has only finitely many inference rules); (II) U has only finitely many extensions. (shrink)

In this study, W. J. Waluchow argues that debates between defenders and critics of constitutional bills of rights presuppose that constitutions are more or less rigid entities. Within such a conception, constitutions aspire to establish stable, fixed points of agreement and pre-commitment, which defenders consider to be possible and desirable, while critics deem impossible and undesirable. Drawing on reflections about the nature of law, constitutions, the common law, and what it is to be a democratic representative, Waluchow urges a different (...) theory of bills of rights that is flexible and adaptable. Adopting such a theory enables one not only to answer to critics' most serious challenges, but also to appreciate the role that a bill of rights, interpreted and enforced by unelected judges, can sensibly play in a constitutional democracy. (shrink)

W. J. Mander presents a history of metaphysics in nineteenth-century Britain. He traces the story of the development and interplay of three great schools of thought, the agnostics, the empiricists, and the idealists, and their different responses to the idea of an ultimate but unknowable way that things really are in themselves.

This is the first full assessment of British philosophy in the 19th century. Specially written essays by leading experts explore the work of the key thinkers of this remarkable period in intellectual history, covering logic and scientific method, metaphysics, religion, positivism, the impact of Darwin, and ethical, social, and political theory.

"[Mitchell] undertakes to explore the nature of images by comparing them with words, or, more precisely, by looking at them from the viewpoint of verbal language.... The most lucid exposition of the subject I have ever read."—Rudolf Arnheim, _Times Literary Supplement_.

Although the notion of spatiality has always lurked in the background of discussions of literary form, the self-conscious use of the term as a critical concept is generally traced to Joseph Frank's seminal essay of 1945, "Spatial Form in Modern Literature."1 Frank's basic argument is that modernist literary works are "spatial" insofar as they replace history and narrative sequence with a sense of mythic simultaneity and disrupt the normal continuities of English prose with disjunctive syntactic arrangements. This argument has been (...) attacked on several fronts. An almost universal objection is that spatial form is a "mere metaphor" which has been given misplaced concreteness and that it denies the essentially temporal nature of literature. Some critics will concede that the metaphor contains a half-truth, but one which is likely to distract attention from more important features of the reading experience. The most polemical attacks have come from those who regard spatial form as an actual, but highly regrettable, characteristic of modern literature and who have linked it with antihistorical and even fascist ideologies.2 Advocates of Frank's position, on the other hand, have generally been content to extrapolate his premises rather than criticize them, and have compiled an ever-mounting list of modernist texts which can be seen, in some sense, as "antitemporal." The whole debate can best be advanced, in my view, not by some patchwork compromise among the conflicting claims but by a radical, even outrageous statement of the basic hypothesis in its most general form. I propose, therefore, that far from being a unique phenomenon of some modern literature, and far from being restricted to the features which Frank identifies in those works , spatial form is a crucial aspect of the experience and interpretation of literature in all ages and cultures. The burden of proof, in other words, is not on Frank to show that some works have spatial form but on his critics to provide an example of any work that does not. · 1. Frank's essay first appeared in Sewanee Review 53 and was revised in his The Widening Gyre . Frank's basic argument has not changed essentially even in his most avante-garde statements; he still regards spatial form "as a particular phenomenon of modern avante-garde writing." See "Spatial Form: An Answer to Critics," Critical Inquiry 4 : 231-52. A useful bibliography, "Space and Spatial Form in Narrative," is being complied by Jeffrey Smitten .· 2. This charge generally links the notion of spatial form with Wyndham Lewis and Ezra Pound, the imagist movement, the "irrationality" and pessimistic antihistoricism of modernism, and the conservative Romantic tradition. Frank discusses the complex motives behind these associations in the work of Robert Weimann and Frank Kermode in his "Answer to Critics," pp. 238-48. W. J. T. Mitchell, editor of Critical Inquiry, is the author of Blake's Composite Art, and The Last Dinosaur Book: The Life and Times of a Cultural Icon. The present essay is part of Iconology: The Image in Literature and the Visual Arts. "Diagrammatology" appeared in the Spring 1981 issue of Critical Inquiry. Leon Surette responds to the current essay in "‘Rational Form in Literature’". (shrink)

We study modal logics in the setting of varieties of modal algebras. Any variety of modal algebras generated by a finite algebra — such, a variety is called tabular — has only finitely many subvarieties, i.e. is of finite height. The converse does not hold in general. It is shown that the converse does hold in the lattice of varieties of K4-algebras. Hence the lower part of this lattice consists of tabular varieties only. We proceed to show that there is (...) a continuum of pretabular varieties of K4-algebras — those are the non-tabular varieties all of whose proper subvarieties are tabular — in contrast with Maksimova's result that there are only five pretabular varieties of S4-algebras. (shrink)