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Franz Brentano

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Title: Franz Brentano  
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Subject: Intentionality, Per Martin-Löf, Carl Stumpf, Philosophy of mind, Phenomenology (philosophy)
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Franz Brentano

Franz Brentano
Born January 16, 1838
Marienberg am Rhein, Rhine, Prussia
Died March 17, 1917 (aged 79)
Zürich, Switzerland
Era 19th-century philosophy
Region Western Philosophy
School School of Brentano
Notable ideas
Intentionality, time-consciousness, judgement–predication distinction

Franz Clemens Honoratus Hermann Brentano (January 16, 1838 – March 17, 1917) was an influential German philosopher and psychologist whose work strongly influenced not only students Sigmund Freud (whose doctoral dissertation he helped supervise), Kazimierz Twardowski, Alexius Meinong, and Thomas Masaryk (as well as Masaryk's student, Edmund Husserl), but countless others whose work would follow and make use of his original ideas and concepts.


  • Life 1
  • Work and thought 2
    • Intentionality 2.1
    • Theory of perception 2.2
    • Theory of judgment 2.3
  • Bibliography 3
    • Major works by Brentano 3.1
  • See also 4
  • References 5
  • External links 6


Brentano was born at Marienberg am Rhein, near Boppard. He studied philosophy at the universities of Munich, Würzburg, Berlin (with Adolf Trendelenburg) and Münster. He had a special interest in Aristotle and scholastic philosophy. He wrote his dissertation in Tübingen On the manifold sense of Being in Aristotle. Subsequently he began to study theology and entered the seminary in Munich and then Würzburg. He was ordained a Catholic priest on August 6, 1864. In 1865/66 he wrote and defended his habilitation essay and thesis and began to lecture at the University of Würzburg. His students in this period included, among others, Carl Stumpf and Anton Marty. Between 1870 and 1873 Brentano was heavily involved in the debate on papal infallibility. A strong opponent of such dogma, he eventually gave up his priesthood and his tenure in 1873 and in 1879 left the church altogether. He remained, however, deeply religious[2] and dealt with the topic of the existence of God in lectures given at the Universities of Würzburg and Vienna.[3]

In 1874 Brentano published his major work: Psychology from an Empirical Standpoint. From 1874 to 1895 taught at the University of Vienna; among his students were Edmund Husserl, Alexius Meinong, Christian von Ehrenfels, Rudolf Steiner, T.G. Masaryk, Sigmund Freud, Kazimierz Twardowski and many others (see School of Brentano for more details). While he began his career as a full ordinary professor, he was forced to give up both his Austrian citizenship and his professorship in 1880 in order to marry, but he was permitted to stay at the university only as a Privatdozent. After his retirement he moved to Florence in Italy, transferring to Zürich at the outbreak of the First World War, where he died in 1917.

Work and thought


Brentano is best known for his reintroduction of the concept of intentionality — a concept derived from scholastic philosophy — to contemporary philosophy in his lectures and in his work Psychologie vom Empirischen Standpunkt (Psychology from an Empirical Standpoint). While often simplistically summarised as "aboutness" or the relationship between mental acts and the external world, Brentano defined it as the main characteristic of mental phenomena, by which they could be distinguished from physical phenomena. Every mental phenomenon, every psychological act has content, is directed at an object (the intentional object). Every belief, desire etc. has an object that they are about: the believed, the desired. Brentano used the expression "intentional inexistence" to indicate the status of the objects of thought in the mind. The property of being intentional, of having an intentional object, was the key feature to distinguish psychological phenomena and physical phenomena, because, as Brentano defined it, physical phenomena lacked the ability to generate original intentionality, and could only facilitate an intentional relationship in a second-hand manner, which he labeled derived intentionality.

Theory of perception

He is also well known for claiming that Wahrnehmung ist Falschnehmung ('perception is misception') that is to say perception is erroneous. In fact he maintained that external, sensory perception could not tell us anything about the de facto existence of the perceived world, which could simply be illusion. However, we can be absolutely sure of our internal perception. When I hear a tone, I cannot be completely sure that there is a tone in the real world, but I am absolutely certain that I do hear. This awareness, of the fact that I hear, is called internal perception. External perception, sensory perception, can only yield hypotheses about the perceived world, but not truth. Hence he and many of his pupils (in particular Carl Stumpf and Edmund Husserl) thought that the natural sciences could only yield hypotheses and never universal, absolute truths as in pure logic or mathematics.

However, in a reprinting of his Psychologie vom Empirischen Standpunkte [Psychology from an Empirical Standpoint], he recanted this previous view. He attempted to do so without reworking the previous arguments within that work but it has been said that he was wholly unsuccessful. The new view states that when we hear a sound, we hear something from the external world; there are no physical phenomena of internal perception.[4]

Theory of judgment

Brentano has a theory of judgment which is different from what is currently the predominant (Fregean) view. At the centre of Brentano’s theory of judgment lies the idea that a judgment depends on having a presentation, but this presentation does not have to be predicated. Even stronger: Brentano thought that predication is not even necessary for judgment, because there are judgments without a predicational content. Another fundamental aspect of his theory is that judgments are always existential. This so-called existential claim implies that when someone is judging that S is P he/she is judging that some S that is P exists. (Note that Brentano denied the idea that all judgments are of the form: S is P [and all other kinds of judgment which combine presentations]. Brentano argued that there are also judgments arising from a single presentation, e.g. “the planet Mars exists” has only one presentation.) In Brentano’s own symbols, a judgment is always of the form: ‘+A’ (A exists) or ‘–A’ (A does not exist). Combined with the third fundamental claim of Brentano, the idea that all judgments are either positive (judging that A exists) or negative (judging that A does not exist), we have a complete picture of Brentano’s theory of judgment. So, imagine that you doubt whether midgets exist. At that point you have a presentation of midgets in your mind. When you judge that midgets do not exist, then you are judging that the presentation you have does not present something that exists. You do not have to utter that in words or otherwise predicate that judgment. The whole judgment takes place in the denial (or approval) of the existence of the presentation you have. The problem of Brentano’s theory of judgment is not the idea that all judgments are existential judgments (though it is sometimes a very complex enterprise to transform an ordinary judgment into an existential one), the real problem is that Brentano made no distinction between object and presentation. A presentation exists as an object in your mind. So you cannot really judge that A does not exist, because if you do so you also judge that the presentation is not there (which is impossible, according to Brentano’s idea that all judgments have the object which is judged as presentation). Twardowski acknowledged this problem and solved it by denying that the object is equal to the presentation. This is actually only a change within Brentano’s theory of perception, but has a welcome consequence for the theory of judgment, viz. that you can have a presentation (which exists) but at the same time judge that the object does not exist.


Major works by Brentano

  • (1862) On the Several Senses of Being in Aristotle (Von der mannigfachen Bedeutung des Seienden nach Aristoteles)
  • (1867) The Psychology of Aristotle (Die Psychologie des Aristoteles: Insbesondere seine Lehre vom nous Poiētikos) (Online)
  • (1874) Psychology from an Empirical Standpoint (Psychologie vom empirischen Standpunkt) (Online)
  • (1876) Was für ein Philosoph manchmal Epoche macht (a work against Plotinus) (Online)
  • (1889) The Origin of our Knowledge of Right and Wrong (1902 English edition online)
  • (1911) Aristotle and his World View (Aristoteles und seine Weltanschauung)
  • (1911) The Classification of Mental Phenomena (Die Klassifikation von Geistesphänomenen)
  • (1924–28) Psychologie vom empirischen Standpunkt. Ed. Oskar Kraus, 3 vols. Leipzig: Meiner. ISBN 3-7873-0014-7
  • (1966) The True and The Evident (Wahrheit und Evidenz)
  • (1976) Philosophical Investigations on Space, Time and Phenomena (Philosophische Untersuchungen zu Raum, Zeit und Kontinuum)
  • (1982) Descriptive Psychology (Deskriptive Psychologie)
  • (2008) Psychologie vom empirischen Standpunkte. Von der Klassifikation der psychischen Phänomene. Ed. Mauro Antonelli. Heusenstamm: Ontos. ISBN 978-3-938793-41-1
  • Sämtliche veröffentlichte Schriften in zehn Bänden (Selected Works in ten volumes, edited by Arkadiusz Chrudzimski and Thomas Binder), Frankfurt: Ontos Verlag (now Walter de Gruyter).
    • 1. Psychologie vom empirischen Standpunkte (2008)
    • 2. Untersuchungen zur Sinnespsychologie (2009)
    • 3. Schriften zur Ethik und Ästhetik (2010)
    • 4. Von der mannigfachen Bedeutung des Seienden nach Aristoteles (2014)

See also


  1. ^ (2008)Toward the Rebirth of Aristotelian Psychology: Trendelenburg and BrentanoEdoardo Fugali,
  2. ^ Boltzmann, Ludwig. 1995. Ludwig Boltzmann: His Later Life and Philosophy, 1900-1906: Book Two: The Philosopher. Springer Science & Business Media, p. 3
  3. ^ Brentano, F.C. . 1987. On the Existence of God: Lectures Given at the Universities of Würzburg and Vienna (1868-1891). Springer Science & Business Media,
  4. ^ See Postfix in the 1923 edition (in German) or the 1973, English version (ISBN 0710074255, edited by Oskar Kraus; translated [from the German] by Antos C. Rancurello, D. B. Terrell and Linda L. McAlister; English edition edited by Linda L. McAlister).

External links

  • Franz Brentano website
  • Franz Brentano entry by Wolfgang Huemer in the Stanford Encyclopedia of Philosophy
  • Brentano's Theory of Judgement entry by Johannes Brandl in the Stanford Encyclopedia of Philosophy
  • Franz Brentano's Ontology and His Immanent Realism Contains a list of the English translations of Brentano's works
  •  "Brentano, Franz".  
  • Works by or about Franz Brentano at Internet Archive
  • The Origin of the Knowledge of Right and Wrong by Franz Brentano at Project Gutenberg
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