•  9
    In this paper, three problems that have hardly been noticed or even gone unnoticed in the available literature in the cosmology of Philolaus are addressed. They have to do with the interrelationships of the orbits of the Earth, the Sun, and the Moon around the Central Fire and all three of them constitute potentially insurmountable obstacles within the context of the Philolaic system. The first difficulty is Werner Ekschmitt’s claim that the Philolaic system cannot account for the length of the …Read more
  •  38
    This book is a sequel to Heaven and Earth in Ancient Greek Cosmology. With the help of many pictures, the reader is introduced into the way of thinking of ancient believers in a flat earth. The first part offers new interpretations of several Presocratic cosmologists and a critical discussion of Aristotle’s proofs that the earth is spherical. The second part explains and discusses the ancient Chinese system called gai tian. The last chapter shows that, inadvertently, ancient arguments and ideas …Read more
  •  11
    Anaximander’s 'Boundless Nature'
    with Radim Kočandrle
    Peitho 4 (1): 63-92. 2013.
    The usual interpretation has it that Anaximander made ‘the Boundless’ the source and principle of everything. However, in the works of Aristotle, the nearest witness, no direct connection can be found between Anaximander and ‘the Boundless’. On the contrary, Aristotle says that all the physicists made something else the subject of which ἄπειρος is a predicate. When we take this remark seriously, it must include Anaximander as well. This means that Anaximander did not make τὸ ἄπειρον the source o…Read more
  •  12
    Apeiron: Anaximander on Generation and Destruction
    with Radim Kočandrle
    Springer Verlag. 2017.
    This book offers an innovative analysis of the Greek philosopher Anaximander’s work. In particular, it presents a completely new interpretation of the key word Apeiron, or boundless, offering readers a deeper understanding of his seminal cosmology and, with it, his unique conception of the origin of the universe. Anaximander traditionally applied Apeiron to designate the origin of everything. The authors’ investigation of the extant sources shows, however, that this common view misses the mark. …Read more
  • Het universum volgens Kant
    Algemeen Nederlands Tijdschrift voor Wijsbegeerte 88 (1): 18-30. 1996.
  •  9
    Over de tautologie in wittgensteins „tractatus”
    Tijdschrift Voor Filosofie 26 (1). 1964.
    In this article the author gives a systematical exposition and interpretation of the concept of a tautology in Wittgenstein's 'Tractatus'. The following questions are discussed successively : 1. What is, according to Wittgenstein, a tautology ? The answer to this question is given by means of an exposition of the definition of 'tautology' in 4.46. The tautology appears to be that result of the manipulation with truth-tables which cancels itself. Within this scope an interpretation is given of th…Read more
  •  12
    Ludwig Wittgenstein I : Transcendentaalfilosoof, ja of neen ?
    Tijdschrift Voor Filosofie 32 (2). 1970.
    Von verschiedenen Seiten her sind Versuche unternommen, Wittgensteins Tractates transzendental philosophisch und im besondern kantisch zu interpretieren. Es wird hier eine Beurteilung dieser Versuchen gegeben, ausgehend von der Gedanke, dass Wittgenstein eine Schlüsselstellung zukommen könnte zwischen die kontinentale und die angelsaksische Tradition in der Philosophie. A. Maslow war der erste der Wittgensteins Frühwerk im kantischen Perspektiv sah. Wittgensteins Sprachformen sind ihm die transz…Read more
  •  14
    Valangst: Hemel en aarde in de antieke kosmologie
    Tijdschrift Voor Filosofie 65 (2). 2003.
    The idea of the spherical world, poised in space, and encircled at different distances by the celestial bodies, was introduced by the early Greek cosmologists. With some modifications, it is still our Western world-picture. It differs fundamentally from that of other cultures, which all accept, in one version or another, the idea of a flat earth with the dome of the celestial vault above it. The Greek conception, however, entails the problem of falling. How to account for the earth's stability? …Read more
  •  16
    Imagining the Universe (review)
    Apeiron 35 (1). 2002.
  •  54
    Within the timespan of two years, two books have been published on the Presocratics as scientists. In 2011 appeared Carlo Rovelli’s The First Scientist. Anaximander and His Legacy, (Yardley: Westholme), and in 2013 Daniel Graham’s Science before Socrates. Whereas Rovelli, whose main field of study is quantum gravity, argues that Anaximander was the first scientist, Graham maintains that Anaximander should not count as a scientist. Empirical science started with Anaxagoras, who used his assumptio…Read more
  •  7
    Problems with Anaximander's Numbers
    Apeiron 42 (3): 167-184. 2009.
    Diogenes Laërtius and Plinius report that Anaximander made a globe, meaning a celestial globe. These statements must be due to an anachronistic misunderstanding, as a celestial globe presupposes a conception of a spherical universe in which the stars make up the outermost sphere. According to Anaximander, however, the stars are nearest to the earth, as is confi rmed by Aëtius and Hippolytus. Generally speaking, Anaximander’s universe of a column-drum-like earth at the center of the concentric wh…Read more
  •  24
    Internet Encyclopedia of Philosophy. 2001.
  •  25
    Places the development of Anaximander's thought within social, political, cosmological, astronomical, and technological contexts
  •  62
    In the doxography on Anaximander it is reported that he has made a celestial globe or another kind of model, map or sketch of his astronomical conceptions. Several scholars have tried to reconstruct this model, but without success. In fact the history of the reconstruction of Anaximander's model of the heavens is a concatenation of mistakes and misunderstandings. The various and sometimes ingenious attempts will be discussed hereafter. Mostly the efforts fail through the difficulty of putting on…Read more
  •  76
    The first part of this article examines Patricia O'Grady's recent attempt to identify the method by which Thales might have successfully predicted a solar eclipse. According to O'Grady, some 60% of the potentially visible lunar eclipses were followed 23½ months later by potentially visible solar eclipses. It is shown that this ratio is no more than 23%, and that the method fails to predict after which specific lunar eclipse a solar eclipse will appear. In the second half of the article it is arg…Read more
  •  2
    Presteros aulos Revisited
    Apeiron 34 (3): 195-205. 2001.
  •  35
    In Miletus, about 550 B.C., together with our world-picture cosmology was born. This book tells the story. In Part One the reader is introduced in the archaic world-picture of a flat earth with the cupola of the celestial vault onto which the celestial bodies are attached. One of the subjects treated in that context is the riddle of the tilted celestial axis. This part also contains an extensive chapter on archaic astronomical instruments. Part Two shows how Anaximander (610-547 B.C.) blew up th…Read more