Author | John Locke |
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Language | English |
Subject | Epistemology |
Publication date | 1689 (dated 1690) |
Publication place | England |
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An Essay Concerning Human Understanding is a work by John Locke concerning the foundation of human knowledge and understanding. It first appeared in 1689 (although dated 1690) with the printed title An Essay Concerning Humane Understanding. He describes the mind at birth as a blank slate ( tabula rasa , although he did not use those actual words) filled later through experience. The essay was one of the principal sources of empiricism in modern philosophy, and influenced many enlightenment philosophers, such as David Hume and George Berkeley.
Book I of the Essay is Locke's attempt to refute the rationalist notion of innate ideas. Book II sets out Locke's theory of ideas, including his distinction between passively acquired simple ideas—such as "red", "sweet", "round"—and actively built complex ideas, such as numbers, causes and effects, abstract ideas, ideas of substances, identity, and diversity. Locke also distinguishes between the truly existing primary qualities of bodies, like shape, motion and the arrangement of minute particles, and the secondary qualities that are "powers to produce various sensations in us" [1] such as "red" and "sweet." These secondary qualities, Locke claims, are dependent on the primary qualities. He also offers a theory of personal identity, offering a largely psychological criterion. Book III is concerned with language, and Book IV with knowledge, including intuition, mathematics, moral philosophy, natural philosophy ("science"), faith, and opinion.
The main thesis is that there are "No Innate Principles." Locke wrote, "If we will attentively consider new-born children, we shall have little reason to think, that they bring many ideas into the world with them." Rather, "by degrees, afterwards, ideas come into their minds; and...they get no more, nor no other, than what experience, and the observation of things, that come in their way, furnish them with." [2] Book I of the Essay is an attack on nativism or the doctrine of innate ideas; Locke indeed sought to rebut a prevalent view of innate ideas that was, in his words, an "established opinion" firmly held by philosophers of his time. [3] While he allowed that some ideas are in the mind from an early age, he argued that those ideas are furnished by the senses starting in the womb—for instance, differences between colours or tastes. If we have a universal understanding of a concept like sweetness, it is not because this is an innate idea, but because we are all exposed to sweet tastes at an early age. [4]
One of Locke's fundamental arguments against innate ideas is the very fact that there is no truth to which all people attest. He took the time to argue against a number of propositions that rationalists offer as universally accepted truth, for instance the principle of identity, pointing out that at the very least children and idiots are often unaware of these propositions. [5] In anticipating a counterargument, namely the use of reason to comprehend already existent innate ideas, Locke states that "by this means, there will be no difference between the maxims of the mathematicians, and theorems they deduce from them; all must be equally allowed innate; they being all discoveries made by the use of reason." [6]
Whereas Book I is intended to reject the doctrine of innate ideas proposed by Descartes and the rationalists, Book II explains that every idea is derived from experience either by sensation—i.e. direct sensory information—or reflection—i.e. "the perception of the operations of our own mind within us, as it is employed about the ideas it has got."
In Book II, Locke focuses on the ideas of substances and qualities, in which the former are "an unknown support of qualities" and latter have the "power to produce ideas in our mind." [7] Substance is what holds qualities together, while qualities themselves allow us to perceive and identify objects. A substance consists of bare particulars and does not have properties in themselves except the ability to support qualities. Substances are "nothing but the assumption of an unknown support for a group of qualities that produce simple ideas in us." [8] Despite his explanation, the existence of substances is still questionable as they cannot necessarily be "perceived" by themselves and can only be sensed through the qualities.
In terms of qualities, Locke divides such into primary and secondary, whereby the former give our minds ideas based on sensation and actual experience. In contrast, secondary qualities allow our minds to understand something based on reflection, in which we associate what we perceive with other ideas of our own. [9]
Furthermore, Book II is also a systematic argument for the existence of an intelligent being:
Thus, from the consideration of ourselves, and what we infallibly find in our own constitutions, our reason leads us to the knowledge of this certain and evident truth, that there is an eternal, most powerful, and most knowing being; which whether any one will please to call God, it matters not!
Locke contends that consciousness is what distinguishes selves, and thus, [10]
…in this alone consists personal Identity, i.e. the sameness of rational Being: And as far as this consciousness can be extended backwards to any past Action or Thought, so far reaches the Identity of that Person; it is the same self now it was then; and 'tis by the same self with this present one that now reflects on it, that that Action was done.
Book III focuses on words. Locke connects words to the ideas they signify, claiming that man is unique in being able to frame sounds into distinct words and to signify ideas by those words, and then that these words are built into language.
Chapter ten in this book focuses on "Abuse of Words." Here, Locke criticizes metaphysicians for making up new words that have no clear meaning. He also criticizes the use of words which are not linked to clear ideas, and to those who change the criteria or meaning underlying a term.
Thus, Locke uses a discussion of language to demonstrate sloppy thinking, following the Port-Royal Logique (1662) [11] in numbering among the abuses of language those that he calls "affected obscurity" in chapter 10. Locke complains that such obscurity is caused by, for example, philosophers who, to confuse their readers, invoke old terms and give them unexpected meanings or who construct new terms without clearly defining their intent. Writers may also invent such obfuscation to make themselves appear more educated or their ideas more complicated and nuanced or erudite than they actually are.
This book focuses on knowledge in general—that it can be thought of as the sum of ideas and perceptions. Locke discusses the limit of human knowledge, and whether such can be said to be accurate or truthful.
Thus, there is a distinction between what an individual might claim to know, as part of a system of knowledge, and whether or not that claimed knowledge is actual. Locke writes at the beginning of the fourth chapter ("Of the Reality of Knowledge"):
I doubt not but my Reader by this Time may be apt to think that I have been all this while only building a Castle in the Air; and be ready to say to me, To what purpose all this stir? Knowledge, say you, is only the Perception of the Agreement or Disagreement of our own Ideas: but who knows what those Ideas may be?… But of what use is all this fine Knowledge of Men's own Imaginations, to a Man that enquires after the reality of things? It matters not what Men's Fancies are, 'tis the Knowledge of Things that is only to be priz'd; 'tis this alone gives a Value to our Reasonings, and Preference to one Man's Knowledge over another's, that it is of Things as they really are, and not of Dreams and Fancies.
In the last chapter of the book, Locke introduces the major classification of sciences into natural philosophy, semiotics, and ethics.
Many of Locke's views were sharply criticized by rationalists and empiricists alike. In 1704, rationalist Gottfried Leibniz wrote a response to Locke's work in the form of a chapter-by-chapter rebuttal, titled the Nouveaux essais sur l'entendement humain (New Essays on Human Understanding). Leibniz was critical of a number of Locke's views in the Essay, including his rejection of innate ideas; his skepticism about species classification; and the possibility that matter might think, among other things. Leibniz thought that Locke's commitment to ideas of reflection in the Essay ultimately made him incapable of escaping the nativist position or being consistent in his empiricist doctrines of the mind's passivity.
Empiricist George Berkeley was equally critical of Locke's views in the Essay. Berkeley's most notable criticisms of Locke were first published in A Treatise Concerning the Principles of Human Knowledge , in which Berkeley holds that Locke's conception of abstract ideas are incoherent and lead to severe contradictions. He also argues that Locke's conception of material substance was unintelligible, a view which he also later advanced in the Three Dialogues Between Hylas and Philonous .
At the same time, Locke's work provided crucial groundwork for future empiricists such as David Hume. John Wynne published An Abridgment of Mr. Locke's Essay concerning the Human Understanding, with Locke's approval, in 1696. Likewise, Louisa Capper wrote An Abridgment of Locke's Essay concerning the Human Understanding, published in 1811.
Some European philosophers saw the book's impact on psychology as comparable to Isaac Newton's impact upon science. Voltaire wrote: [12]
Just as a skilled anatomist explains the workings of the human body, so does Locke's Essay on the Human Understanding give the natural history of consciousness.… So many philosophers having written the romance of the soul, a sage has arrived who has modestly written its history.
An Enquiry Concerning Human Understanding is a book by the Scottish empiricist philosopher David Hume, published in English in 1748 under the title Philosophical Essays Concerning Human Understanding until a 1757 edition came up with the now-familiar name. It was a revision of an earlier effort, Hume's A Treatise of Human Nature, published anonymously in London in 1739–40. Hume was disappointed with the reception of the Treatise, which "fell dead-born from the press," as he put it, and so tried again to disseminate his more developed ideas to the public by writing a shorter and more polemical work.
In philosophy, empiricism is an epistemological view which holds that true knowledge or justification comes only or primarily from sensory experience and empirical evidence. It is one of several competing views within epistemology, along with rationalism and skepticism. Empiricists argue that empiricism is a more reliable method of finding the truth than purely using logical reasoning, because humans have cognitive biases and limitations which lead to errors of judgement. Empiricism emphasizes the central role of empirical evidence in the formation of ideas, rather than innate ideas or traditions. Empiricists may argue that traditions arise due to relations of previous sensory experiences.
George Berkeley – known as Bishop Berkeley – was an Anglo-Irish philosopher whose primary achievement was the advancement of a theory he called "immaterialism". This theory denies the existence of material substance and instead contends that familiar objects like tables and chairs are ideas perceived by the mind and, as a result, cannot exist without being perceived. Berkeley is also known for his critique of abstraction, an important premise in his argument for immaterialism.
Substance theory, or substance–attribute theory, is an ontological theory positing that objects are constituted each by a substance and properties borne by the substance but distinct from it. In this role, a substance can be referred to as a substratum or a thing-in-itself. Substances are particulars that are ontologically independent: they are able to exist all by themselves. Another defining feature often attributed to substances is their ability to undergo changes. Changes involve something existing before, during and after the change. They can be described in terms of a persisting substance gaining or losing properties. Attributes or properties, on the other hand, are entities that can be exemplified by substances. Properties characterize their bearers; they express what their bearer is like.
Tabula rasa is the idea of individuals being born empty of any built-in mental content, so that all knowledge comes from later perceptions or sensory experiences. Proponents typically form the extreme "nurture" side of the nature versus nurture debate, arguing that humans are born without any "natural" psychological traits and that all aspects of one's personality, social and emotional behaviour, knowledge, or sapience are later imprinted by one's environment onto the mind as one would onto a wax tablet. This idea is the central view posited in the theory of knowledge known as empiricism. Empiricists disagree with the doctrines of innatism or rationalism, which hold that the mind is born already in possession of specific knowledge or rational capacity.
In philosophy, rationalism is the epistemological view that "regards reason as the chief source and test of knowledge" or "any view appealing to reason as a source of knowledge or justification", often in contrast to other possible sources of knowledge such as faith, tradition, or sensory experience. More formally, rationalism is defined as a methodology or a theory "in which the criterion of truth is not sensory but intellectual and deductive".
In common usage and in philosophy, ideas are the results of thought. Also in philosophy, ideas can also be mental representational images of some object. Many philosophers have considered ideas to be a fundamental ontological category of being. The capacity to create and understand the meaning of ideas is considered to be an essential and defining feature of human beings.
Subjective idealism, or empirical idealism or immaterialism, is a form of philosophical monism that holds that only minds and mental contents exist. It entails and is generally identified or associated with immaterialism, the doctrine that material things do not exist. Subjective idealism rejects dualism, neutral monism, and materialism; it is the contrary of eliminative materialism, the doctrine that all or some classes of mental phenomena do not exist, but are sheer illusions.
Modern philosophy is philosophy developed in the modern era and associated with modernity. It is not a specific doctrine or school, although there are certain assumptions common to much of it, which helps to distinguish it from earlier philosophy.
In the philosophy of mind, innatism is the view that the mind is born with already-formed ideas, knowledge, and beliefs. The opposing doctrine, that the mind is a tabula rasa at birth and all knowledge is gained from experience and the senses, is called empiricism.
A Treatise Concerning the Principles of Human Knowledge is a 1710 work, in English, by Irish Empiricist philosopher George Berkeley. This book largely seeks to refute the claims made by Berkeley's contemporary John Locke about the nature of human perception. Whilst, like all the Empiricist philosophers, both Locke and Berkeley agreed that we are having experiences, regardless of whether material objects exist, Berkeley sought to prove that the outside world is also composed solely of ideas. Berkeley did this by suggesting that "Ideas can only resemble Ideas" – the mental ideas that we possess can only resemble other ideas and thus the external world consists not of physical form, but rather of ideas. This world is given logic and regularity by some other force, which Berkeley concludes is God.
Three Dialogues between Hylas and Philonous, or simply Three Dialogues, is a 1713 book on metaphysics and idealism written by George Berkeley. Taking the form of a dialogue, the book was written as a response to the criticism Berkeley experienced after publishing A Treatise Concerning the Principles of Human Knowledge.
Nous, from Greek: νοῦς, is a concept from classical philosophy, sometimes equated to intellect or intelligence, for the faculty of the human mind necessary for understanding what is true or real.
The term Cartesian linguistics was coined by Noam Chomsky in his book Cartesian Linguistics: A Chapter in the History of Rationalist Thought (1966). The adjective "Cartesian" pertains to René Descartes, a prominent 17th-century philosopher. As well as Descartes, Chomsky surveys other examples of rationalist thought in 17th-century linguistics, in particular the Port-Royal Grammar (1660), which foreshadows some of his own ideas concerning universal grammar.
Richard Ithamar Aaron,, was a Welsh philosopher who became an authority on the work of John Locke. He also wrote a history of philosophy in the Welsh language.
The primary–secondary quality distinction is a conceptual distinction in epistemology and metaphysics, concerning the nature of reality. It is most explicitly articulated by John Locke in his Essay concerning Human Understanding, but earlier thinkers such as Galileo and Descartes made similar distinctions.
Michael Richard Ayers is a British philosopher and professor emeritus of philosophy at the University of Oxford. He studied at St John's College, Cambridge, and was a fellow of Wadham College, Oxford, from 1965 until 2002. Among his students are Colin McGinn and William Child.
British philosophy refers to the philosophical tradition of the British people. "The native characteristics of British philosophy are these: common sense, dislike of complication, a strong preference for the concrete over the abstract and a certain awkward honesty of method in which an occasional pearl of poetry is embedded".
New Essays on Human Understanding is a chapter-by-chapter rebuttal by Gottfried Leibniz of John Locke's major work An Essay Concerning Human Understanding (1689). It is one of only two full-length works by Leibniz. It was finished in 1704, but Locke's death was the cause alleged by Leibniz to withhold its publication. The book was published in 1765, some 60 years following its completion. Leibniz had died in 1716, and never saw its published form.
Personal identity is the unique numerical identity of a person over time. Discussions regarding personal identity typically aim to determine the necessary and sufficient conditions under which a person at one time and a person at another time can be said to be the same person, persisting through time.