In The Mysteries of Purification (Kitab asrar al tahara), the third of the forty books of the Revival of the Religious Sciences (Ihya' 'ulum al-din), Abu Hamid al-Ghazali explains the fundamentals of the purification that is necessary in order to perform the five daily prayers. The book begins with an introduction to the general topic of purity. Al-Ghazali explains the hadith "Purification is half of faith," and reminds readers that, for the earliest Muslims, inner purification was much more important (...) than outer purification. In chapter 1, he considers purification from impurities: What are the impurities and how should they be removed? Over the following chapters, al-Ghazali examines the lesser ablution (wudu), the greater ablution (ghusl), and the "dry ablution" (ablution without water, or tayammum). He discusses the etiquette of the bathhouse and outlines exactly how to clean the body of external things and natural growths; finally, he discusses the beard and practices related to it. (shrink)

This chapter argues for the History of England’s importance in Hume’s overall achievement. The chapter describes the History’s genesis, reception, methods, and aims. In the role of historian, Hume shared with the ancients the assumption that history is an elevated genre functioning as the “Mistress of Wisdom.” Yet this long work is more notable for historiographical innovation. Like William Robertson and Edward Gibbon, Hume wrote conjectural or philosophical history. Like Machiavelli, Voltaire, and Montesquieu, Hume wrote civil or cultural history, including (...) detailed information on political events, law, commerce, and manners. In a larger sense, the History demonstrates a great philosopher leaving his study to deal with that practical, sometimes intractable world outside the study. A priori reasoning is tested against that a posteriori reality provided by historical evidence. Thus, in writing the History, Hume became an empiricist in an almost literal sense. (shrink)

Scientists recognize the necessity of imagination for solving tough problems. But how does the cognitive faculty responsible for daydreaming help in solving scientific problems? Philosophers claim that imagination is informative only when it is constrained to be maximally realistic. However, using a case study from space science, we show that scientists use imagination intentionally to break reality-oriented constraints. To do this well, they first target low-confidence constraints, and then higher-confidence constraints, until a plausible solution is found. This paper exemplifies a (...) new approach to epistemology of imagination that focuses on sets of imaginings (rather than individual imaginings), and responsible (rather than reliable) imaginings. (shrink)

In this paper we examine C. I. Lewis's view on the roleof coherence – what he calls ''congruence'' – in thejustification of beliefs based on memory ortestimony. Lewis has two main theses on the subject. His negativethesis states that coherence of independent items ofevidence has no impact on the probability of a conclusionunless each item has some credibility of its own. Thepositive thesis says, roughly speaking, that coherenceof independently obtained items of evidence – such asconverging memories or testimonies – raises (...) the probabilityof a conclusion to the extent sufficient for epistemicjustification, or, to use Lewis's expression, ''rationaland practical reliance''.It turns out that, while thenegative thesis is essentially correct, astrong positive connection between congruence andprobability – a connection of the kind Lewis ultimatelyneeds in his validation of memory – is contingent on thePrinciple of Indifference. In the final section we assess therepercussions of the latter fact for Lewis's theory in particularand for coherence justification in general. (shrink)

This paper disputes the widely held view that one cannot establish the reliability of a belief-forming process with the use of belief's that are obtained by that very process since such self-dependent justification is circular. Harold Brown ([1993]) argued in this journal that some cases of self-dependent justification are legitimate despite their circularity. I argue instead that under appropriate construal many cases of self-dependent justification are not truly circular but are instances of ordinary Bayesian confirmation, and hence they can raise (...) the probability of the hypothesis as legitimately as any such confirmation does. I shall argue in particular that despite its dependence on perception we can use naturalized epistemology to confirm the reliability of a perceptual process without circularity. (shrink)

Peirce earned his keep making measurements, mainly of gravity but also astronomical, and he made several contributions to the science of measurement. It has been said that his experience measuring had philosophical consequences: his adoption of fallibilism, his argument against necessitarianism, and his conception of inquiry as converging on the truth have all been mentioned. But not much attention has been paid to the curious episode of his making “the study of great men” part of a course in logic: students (...) were asked to rank a long list of men by order of greatness. That was at Johns Hopkins in 1883. I shall argue that that study, together with his reflections on pre-instrumental estimates of stars’ brightness, bears directly on the method of phaneroscopy formulated nearly two decades later. In each case, the problem is to show how objectivity is possible under conditions in which it must seem that objectivity is impossible. (shrink)

This response to a variety of criticisms of _Charles Peirce and Modern Science_ restates and attempts to clarify and explain major themes of the book.

ch. 1. Istorii︠a︡ sot︠s︡iologicheskikh ucheniĭ -- ch. 2. Nauchnai︠a︡ teorii︠a︡ obshchestva.

This book is remarkable for what it does not do. It purports to be about Peirce's opposition to nominalism, but it never states clearly what nominalism is and says little about Peirce's realist alternative. It contains no historical discussion of nominalism and thus does not explain the relation of Peirce's idiosyncratic use of that term to its original meaning. It ignores the secondary literature on that topic and does not even list Rosa Mayorga's highly relevant 2007 book, From Realism to (...) Realicism [sic], in its Bibliography. Nor, despite nominalism's alleged 'threat,' does it make reference to such important recent nominalists as Nelson Goodman or W.V.O. Quine. Indeed, after page one, there is hardly any.. (shrink)

But as you know... my style of ‘brilliancy’ consists in a mixture of irony and seriousness,—the same things said ironically and also seriously.Peirce’s philosophical writings are notoriously difficult. The reasons most often cited are the apparent contradictions, the long, inconclusive technical digressions, and the unfinished character of his thought. His champions instead emphasize his originality, arguing that his apparent contradictions often mark traditional dualisms subtly transcended; some discern strands of an uncompleted system. Originality, subtlety, and the need to reconstruct the (...) whole from its fragmentary expressions also pose difficulties, albeit ones rewarding. I think, however, that the problem... (shrink)

The following paragraphs were written not for print publication but for oral delivery on a celebratory occasion; their many unsupported assertions, some commonplace and some controversial, were made not to prove a thesis but to suggest a point of view—a perspective on Peirce's thought that might be taken, or not, as one wishes. The suggestion is that some difficulties are resolved and some things fall into place if we view his philosophy in its several relations to modern science. For that (...) purpose, his idea of science is of central importance and it is that idea only that I discuss here. Although drawn from the historical fact of modern science, Peirce's concept of science is unusual, radical, and difficult. In... (shrink)

Peirce persistently proclaimed both idealism and realism, terms that in philosophy's history have had varied meanings, in some of which they designate opposed doctrines; his use of them also varied in meaning. The aim of Robert Lane's important new book is to trace the evolution of Peirce's idealism and realism and to show that, in the end, whatever misadventures occur en route, these doctrines, in Peirce's version of them, are not opposed. Lane explores connections to other Peircean topics: truth, pragmatism, (...) modality, generality, vagueness, continuity. However, he retains his focus, which enables him to examine Peirce's idealism and realism with extraordinary care and thoroughness.Lane's method is, in the first... (shrink)

In May 1867, when he was twenty-seven years of age, Charles Peirce read a paper to the American Academy of Arts and Sciences that was published in the next year under the title ‘On a New List of Categories’ (EP 1:1–10).1 It is remarkable for anticipating major features of his later thought: three categories relationally defined (bracketed, however, by two additional categories); a theory of signs, triadically conceived and triadically sub-divided, applied to thinking; the idea that every predicate is an (...) hypothesis; a form of abstraction named ‘prescision’; and a bold reconception of the Roman/medieval trivium. Prescision was used here to distinguish the categories and it was put to similar use much later in the.. (shrink)