INVENTION

An invention is a new composition, device, or process. An invention may be derived from a pre-existing model or idea, or it could be independently conceived in which case it may be a radical breakthrough. In addition, there is cultural invention, which is an innovative set of useful social behaviors adopted by people and passed on to others.  Inventions often extend the boundaries of human knowledge or experience. An invention that is novel and not obvious to others skilled in the same field may be able to obtain the legal protection of a patent.

Invention is a creative process. An open and curious mind enables one to see beyond what is known. Seeing a new possibility, a new connection or relationship can spark an invention. Inventive thinking frequently involves combining concepts or elements from different realms that would not normally be put together. Sometimes inventors skip over the boundaries between distinctly separate territories or fields. Ways of thinking, materials, processes or tools from one realm are used as no one else has imagined in a different realm.
Play can lead to invention. Childhood curiosity like playing in a sand box, experimentation and imagination can develop one's play instinct—an inner need according to Carl Jung. Inventors feel the need to play with things that interest them, and to explore, and this internal drive brings about novel creations. Thomas Edison: "I never did a day's work in my life, it was all fun". Inventing can also be an obsession.
To invent is to see anew. Inventors often envision a new idea, seeing it in their mind's eye. New ideas can arise when the conscious mind turns away from the subject or problem; or when the focus is on something else; or even while relaxing or sleeping. A novel idea may come in a flash - a Eureka! moment. For example, after years of working to figure out the general theory of relativity, the solution came to Einstein suddenly in a dream "like a giant die making an indelible impress, a huge map of the universe outlined itself in one clear vision". Inventions can also be accidental, such as in the case of polytetrafluoroethylene (Teflon).
Insight is also a vital element of invention. It may begin with questions, doubt or a hunch. It may begin by recognizing that something unusual or accidental may be useful or that it could open a new avenue for exploration. For example, the odd metallic color of plastic made by accidentally adding a thousand times too much catalyst led scientists to explore its metal-like properties, inventing electrically conductive plastic and light emitting plastic-—an invention that won the Nobel Prize in 2000 and has led to innovative lighting, display screens, wallpaper and much more (see conductive polymer, and organic light-emitting diode or OLED).^[4]
Invention is often an exploratory process, with an outcome that is uncertain or unknown. There are failures as well as successes. Inspiration can start the process, but no matter how complete the initial idea, inventions typically have to be developed. Inventors believe in their ideas and they do not give up in the face of one or many failures. They are often famous for their perseverance, confidence and passion.
Inventors may, for example, try to improve something by making it more effective, healthier, faster, more efficient, easier to use, serve more purposes, longer lasting, cheaper, more ecologically friendly, or aesthetically different, e.g., lighter weight, more ergonomic, structurally different, with new light or color properties, etc. Or an entirely new invention may be created such as the Internet, email, the telephone or electric light. Necessity may be the mother of invention, invention may be its own reward, or invention can create necessity. Nobody needed a phonograph before Edison invented it, the need for it developed afterward. Likewise, few ever imagined the telephone or the airplane prior to their invention, but many people cannot live without these inventions now.
The idea for an invention may be developed on paper or on a computer, by writing or drawing, by trial and error, by making models, by experimenting, by testing and/or by making the invention in its whole form. As the dialogue between Picasso and Braque brought about Cubism, collaboration has spawned many inventions. Brainstorming can spark new ideas. Collaborative creative processes are frequently used by designers, architects and scientists. Co-inventors are frequently named on patents. Now it is easier than ever for people in different locations to collaborate. Many inventors keep records of their working process - notebooks, photos, etc., including Leonardo da Vinci, Thomas Jefferson and Albert Einstein.  In the process of developing an invention, the initial idea may change. The invention may become simpler, more practical, it may expand, or it may even morph into something totally different. Working on one invention can lead to others too. There is only one country in the world that will grant patent rights for an invention that continues part of an invention in a previously filed patent—the United States.
The creation of an invention and its use can be affected by practical considerations. Some inventions are not created in the order that enables them to be most useful. For example, the parachute was invented before powered flight.  There are inventions that are too expensive to produce and inventions that require scientific advancements that have not yet occurred. These barriers can erode or disappear as the economic situation changes or as science develops. But history shows that turning an invention that is only an idea into reality can take considerable time, even centuries as demonstrated by inventions originally conceived by Leonardo da Vinci which are now in physical form and commonplace in our lives. Interestingly, some invention that exists as only an idea and has never been made in reality can obtain patent protection.
An invention can serve many purposes, these purposes might differ significantly and they may change over time. An invention or a further developed version of it may serve purposes never envisioned by its original inventor(s) or even by others living at the time of its original invention. As an example, consider all the kinds of plastic developed, their innumerable uses, and the tremendous growth this material invention is still undergoing today.
 nvention has a long and important history in the arts. Inventive thinking has always played a vital role in the creative process. While some inventions in the arts are patentable, others are not because they cannot fulfill the strict requirements governments have established for granting them. (see patent).

Art, design and architecture

"A man paints with his brain and not with his hands." - Michelangelo

Art is continuously reinvented. Many artists, designers, and architects think like inventors. As they create, they may: explore beyond that which is known or obvious, push against barriers, change or discard conventions, and/or break into new territory. Breaking the rules became the most valued attribute in art during the 20th century, with the highest acclaim going to conceptual innovation which frequently involved the invention of new genres. For the first time the idea within the artwork was unmistakably more important than the tangible art object. All kinds of artists have been inventing throughout history, and among their inventions are important contributions to visual art and other fields.
Some visual artists like Picasso become inventors in the process of creating art. Inventions by other artists are separate from their art, such as the scientific inventions of Leonardo da Vinci. Some inventions in visual art employ prior developments in science or technology. For example, Picasso and Julio Gonzalez used welding to invent a new kind of sculpture, the form of which could be more open to light and air, and more recently, computer software has enabled an explosion of invention in visual art, including the invention of computer art, and invention in photography, film, architecture and design. Like the invention of welded sculpture, other inventions in art are new mediums, new art forms, or both. Examples are: the collage and the construction invented by Picasso, the Readymade invented by Marcel Duchamp, the mobile invented by Alexander Calder, the combine invented by Robert Rauschenberg, the shaped painting invented by Frank Stella, and the motion picture, the invention of which is attributed to Eadweard Muybridge. Art has been reinvented by developing new processes of creation. For example, Jackson Pollock invented an entirely new form of painting and a new kind of abstraction by dripping, pouring, splashing and splattering paint onto unstretched canvas laying on the floor. A number of art movements were inventions often created collaboratively, such as Cubism invented by Picasso and Braque. Substantial inventions in art, design and architecture were made possible by inventions and improvements in the tools of the trade. The invention of Impressionist painting, for example, was possible because the prior invention of collapsible, resealable metal paint tubes facilitated spontaneous painting outdoors. Inventions originally created in the form of artwork can also develop other uses, as Alexander Calder's mobile is commonly used over babies' cribs today. Funds generated from patents on inventions in art, design and architecture can support the realization of the invention or other creative work. Frederic Auguste Bartholdi's 1879 patent on the Statue of Liberty helped fund the statue currently in New York harbor because it covered small replicas.
Among other artists, designers and architects who are or were inventors are: Filippo Brunelleschi, Le Corbusier, Naum Gabo, Frederick Hart, Louis Comfort Tiffany, John La Farge, Buckminster Fuller, Walt Disney, Man Ray, Yves Klein, Henry N. Cobb, I. M. Pei, Kenneth Snelson, Helen Frankenthaler, Chuck (Charles) Hoberman and Ingo Maurer. Some of their inventions have been patented. Others might have fulfilled the requirements of a patent, like the Cubist image. There are also inventions in visual art that do not fit into the requirements of a patent. Examples are inventions that cannot be differentiated from that which has already existed clearly enough for approval by government patent offices, such as Duchamp's Readymade and other conceptual works. Invention whose inventor or inventors are not known cannot be patented, such as the invention of abstract art or abstract painting, oil painting, Process Art, Installation art and Light Art. Also, when it cannot or has not been determined whether something was a first in human history or not, there may not be a patentable invention even though it may be considered an invention in the realm of art. For example, Picasso is credited with inventing collage though this was done earlier in cultures outside of the western world.
Inventions in the visual arts that may be patentable might be new materials or mediums, new kinds of images, new processes, novel designs, or they may be a combination of these. Inventions by Filippo Brunelleschi, Frederick Hart, Louis Comfort Tiffany, John La Farge, Walt Disney, Henry N. Cobb, Chuck (Charles) Hoberman and others received patents. The color, International Klein Blue invented by Yves Klein was patented in 1960 and used two years later in his sculpture. Inventions by Kenneth Snelson which are crucial to his sculptures are patented. R. Buckminster Fuller's famous geodesic dome is covered in one of his 28 US patents. Ingo Maurer known for his lighting design has a series of patents on inventions in these works. Many inventions created collaboratively by designers at IDEO Inc. have been patented. Countless other examples can easily be found by searching patents at the websites of the Patent Offices of various countries, such as http://www.USPTO.gov. Inventions in design can be protected in a special kind of patent called a "design patent". The first design patent was granted in 1842 to George Bruce for a new font.

Eureka

Eureka is an interjection used to celebrate a discovery, a transliteration of a word attributed to Archimedes. The word comes from Ancient Greek εὕρηκα heúrēka "I have found (it)", which is the 1st person singular perfect indicative active of the verbheuriskō "I find".  The reconstructed Ancient Greek pronunciation is [heúrɛːka], while the Modern Greek pronunciation is [ˈevrika].

The accent of the English word is on the second syllable, following Latin accent rules, which require that a penult (next-to-last syllable) must be accented if it has a long vowel. In the Greek pronunciation, the first syllable is accented, because the Ancient Greek rules of accent do not force accent to the penult unless the ultima (last syllable) has a long vowel.

The initial /h/ is dropped in many European languages; Finnish is one of those that preserve it (e.g. in Heureka), German is another one (cf.Heureka).

Archimedes

This exclamation is most famously attributed to the ancient Greek scholar Archimedes; he reportedly proclaimed "Eureka!" when he stepped into a bath and noticed that the water level rose — he suddenly understood that the volume of water displaced must be equal to the volume of the part of his body he had submerged. This meant that the volume of irregular objects could be measured with precision, a previously intractable problem. He is said to have been so eager to share his realisation that he leapt out of his bathtub and ran through the streets ofSyracuse naked.

Archimedes' insight led to the solution of a problem posed by Hiero of Syracuse, on how to assess the purity of an irregular golden votive crown; he had given his goldsmith the pure gold to be used, and correctly suspected he had been cheated, by the goldsmith removing gold and adding the same weight of silver. Equipment for weighing objects already existed, and now that Archimedes could also measure volume, their ratio would give the object's density, an important indicator of purity.

This story first appeared in written form in Vitruvius's books of architecture, two centuries after it supposedly took place. Some scholars have doubted the accuracy of this tale, saying among other things that the method would have required precise measurements that would have been difficult to make at the time. For the problem posed to Archimedes, though, there is a simple method which requires no precision equipment: balance the crown against pure gold in air, and then submerge the scale with crown and gold in water to see if they still balance.

Think tank

A think tank (or policy institute) is an organization that conducts research and engages in advocacy in areas such as social policy, politicalstrategy, economy, science or technology issues, industrial or business policies, or military advice. Many think tanks are non-profitorganizations, which some countries such as the United States and Canada provide with tax exempt status. Other think tanks are funded by governments, advocacy groups, or businesses, or derive revenue from consulting or research work related to their projects.

However, this definition has been challenged by recent research on the various functions played by think tanks in different societies.  For instance, work in Latin America showed that think tanks can play a number of functions depending on their origins, historical development and relations to other policy actors. In this study, Orazio Bellettini from Grupo FARO suggests that they:

1. Seek political support for policies – This is an accepted definition of the main role of think tanks across the world.
2. Legitimise policies – This has been clearer in Ecuador, Bolivia and Peru. New governments in Ecuador and Peru have approached think tanks for support for already defined policies. In Bolivia, the government led by Evo Morales has been working with NGOs and other research centres to do the same. However, in the Chilean context, many think tanks during the 1990s appeared to support and maintain the legitimacy of policies implemented during the previous decade by the dictator Augusto Pinochet.
3. Spaces of debate – In this case think tanks serve as sounding boards for new policies. In Chile, during the Pinochet dictatorship, many left wing intellectuals and researchers found ‘asylum’ in think tanks. In Ecuador, think tanks are seen as spaces where politicians can test the soundness of their policies and government plans.
4. Financial channels for political parties or other interest groups – In Ecuador and Bolivia, German foundations have been able to provide funds to think tanks that work with certain political parties. This approach has provided support to the system as a whole rather than individual CSOs.
5. Expert cadres of policy-makers and politicians – In Peru after the fall of the Fujimori regime, and in Chile after the fall of Pinochet, think tank staff left to form part of the new governments. In the U.S., the role of leading think tanks is precisely that: host scholars for a few months or years and then see them off to work in policy.

How a think tank addresses these largely depends on how they work, their ideology vs. evidence credentials, and the context they operate in (including funding opportunities, the degree and type of competition they face, their staff, etc.).

This functional approach addresses the inherit challenge of defining a think tank. As Simon James aptly noted in 1998, "Discussion of think tanks…has a tendency to get bogged down in the vexed question of defining what we mean by ‘think tank’ – an exercise which often degenerates into futile semantics. It is better (as in the Network Functions Approach) to describe what the organisation should do. Then the shape of the organisation should follow to allow this to happen. The following framework (based on Stephen Yeo’s description of think tanks’ mode of work) in the described in Enrique Mendizabal's blog: onthinktanks.

First, think tanks may work in or based their funding on one or more ways, including:

1. Independent research: this would be work done with core or flexible funding that allows the researchers the liberty to choose their research questions and method. It may be long term and could focus on ‘big ideas’ with no direct policy relevance. On the other hand, it could focus on a key policy problem that requires a thorough research and action investment.
2. Consultancy: this would be work done through commissions with specific clients and addressing one or two key questions. Consultancies often respond to an existing agenda.
3. Influencing/advocacy: this would be work done through communications, capacity development, networking, campaigns, lobbying, etc. It is likely to be based on research based evidence emerging from independent research or consultancies.

Second, think tanks may base their work or arguments on:

1. Ideology, values or interests
2. Applied, empirical or synthesis research
3. Theoretical or academic research

According to the National Institute for Research Advancement, a Japanese think tank, think tanks are "one of the main policy actors in democratic societies ..., assuring a pluralistic, open and accountable process of policy analysis, research, decision-making and evaluation".  A study in early 2009 found a total of 5,465 think tanks worldwide. Of that number, 1,777 were based in the United States and approximately 350 in Washington DC alone.

History

Since "think tank" is a term that has only found use since the 1950s, there is still some debate over what constitutes the first think tank. One candidate is the Institute for Defence and Security Studies (RUSI), founded in 1831 at the initiative of the Duke of Wellington. Another is theFabian Society, which dates from 1884. Until around 1910, there were no more than a few dozen think tanks, mostly focused on offering non-partisan policy and military advice to the United States government, and generally with large staffs and research budgets.

After 1930, the number of think tanks exploded, as many smaller new think tanks were formed to express various issue and policy agendas. Until the 1940s, most think tanks were known only by the name of the institution. During the Second World War, think tanks were referred to as "brain boxes" after the slang term for the skull. The phrase "think tank" in wartime American slang referred to rooms in which strategists discussed war planning.

The term think tank itself, however, was originally used in reference to organizations that offered military advice, most notably the RAND Corporation, founded originally in 1946 as an offshoot of Douglas Aircraft and which became an independent corporation in 1948.

WHAT AN IDEA

In the most narrow sense, an idea is just whatever is before the mind when one thinks. Very often, ideas are construed as representational images; i.e. images of some object. In other contexts, ideas are taken to be concepts, although abstract concepts do not necessarily appear as images. Many philosophers consider 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.

In a popular sense, an idea arises in a reflex, spontaneous manner, even without thinking or serious reflection, for example, when we talk about the idea of a person or a place.

Plato, one of the first philosophers to discuss ideas in detail.

Plato

Plato was one of the earliest philosophers to provide a detailed discussion of ideas. He considered the concept of idea in the realm ofmetaphysics and its implications for epistemology. He asserted that there is a realm of Forms or Ideas, which exist independently of anyone who may have thought of these ideas. Material things are then imperfect and transient reflections or instantiations of the perfect and unchanging ideas. From this it follows that these Ideas are the principal reality (see also idealism). In contrast to the individual objects of sense experience, which undergo constant change and flux, Plato held that ideas are perfect, eternal, and immutable. Consequently, Plato considered that knowledge of material things is not really knowledge; real knowledge can only be had of unchanging ideas.

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René Descartes

Descartes often wrote of the meaning of idea as an image or representation, often but not necessarily "in the mind", which was well known in the vernacular. In spite of the fact that Descartes is usually credited with the invention of the non-Platonic use of the term, we find him at first following this vernacular use.^b In his Meditations on First Philosophy he says, "Some of my thoughts are like images of things, and it is to these alone that the name 'idea' properly belongs." He sometimes maintained that ideas were innate and uses of the term idea diverge from the original primary scholastic use. He provides multiple non-equivalent definitions of the term, uses it to refer to as many as six distinct kinds of entities, and divides ideas inconsistently into various genetic categories. For him knowledge took the form of ideas and philosophical investigation is the deep consideration of these ideas. Many times however his thoughts of knowledge and ideas were like those of Plotinus and the Neoplatonists. In Neoplatonism, the Intelligence (Nous) is the true first principle—the determinate, referential "foundation" (arkhe)—of all existents; for it is not a self-sufficient entity like the One, but rather possesses the ability or capacity to contemplate both the One, as its prior, as well as its own thoughts, which Plotinus identifies with the Platonic Ideas or Forms (eide). A non-philosophical definition of Nous is good sense (a.k.a. "common sense"). Descartes is quoted as saying, "Of all things, good sense is the most fairly distributed: everyone thinks he is so well supplied with it that even those who are the hardest to satisfy in every other respect never desire more of it than they already have."q:René Descartes

John Locke

In striking contrast to Plato's use of idea is that of John Locke. In his Introduction to An Essay Concerning Human Understanding, Locke defines idea as "that term which, I think, serves best to stand for whatsoever is the object of the understanding when a man thinks, I have used it to express whatever is meant by phantasm, notion, species, or whatever it is which the mind can be employed about in thinking; and I could not avoid frequently using it." He said he regarded the book necessary to examine our own abilities and see what objects our understandings were, or were not, fitted to deal with. In his philosophy other outstanding figures followed in his footsteps—Hume and Kant in the 18th century, Arthur Schopenhauer in the 19th century, and Bertrand Russell, Ludwig Wittgenstein, and Karl Popper in the 20th century. Locke always believed in good sense—not pushing things to extremes and on taking fully into account the plain facts of the matter. He considered his common sense ideas "good-tempered, moderate, and down-to-earth."^c

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David Hume

Hume differs from Locke by limiting idea to the more or less vague mental reconstructions of perceptions, the perceptual process being described as an "impression."^[6] Hume shared with Locke the basic empiricist premise that it is only from life experiences (whether their own or others') that humans' knowledge of the existence of anything outside of themselves can be ultimately derived, that they shall carry on doing what they are prompted to do by their emotional drives of varying kinds. In choosing the means to those ends, they shall follow their accustomed associations of ideas.^d Hume has contended and defended the notion that "reason alone is merely the 'slave of the passions'."

Immanuel Kant

"Modern Book Printing" from the Walk of Ideas

Immanuel Kant defines an idea as opposed to a concept. "Regulator ideas" are ideals that one must tend towards, but by definition may not be completely realized. Liberty, according to Kant, is an idea. The autonomyof the rational and universal subject is opposed to the determinism of the empirical subject. Kant felt that it is precisely in knowing its limits that philosophy exists. The business of philosophy he thought was not to give rules, but to analyze the private judgements of good common sense.^e

Rudolf Steiner

Whereas Kant declares limits to knowledge ("we can never know the thing in itself"), in his epistemological work,Rudolf Steiner sees ideas as "objects of experience" which the mind apprehends, much as the eye apprehends light. In Goethean Science (1883), he declares, "Thinking ... is no more and no less an organ of perception than the eye or ear. Just as the eye perceives colors and the ear sounds, so thinking perceives ideas." He holds this to be the premise upon which Goethe made his natural-scientific observations.

Wilhelm Wundt

Wundt widens the term from Kant's usage to include conscious representation of some object or process of the external world. In so doing, he includes not only ideas of memory and imagination, but also perceptual processes, whereas other psychologists confine the term to the first two groups. One of Wundt's main concerns was to investigate conscious processes in their own context by experiment andintrospection. He regarded both of these as exact methods, interrelated in that experimentation created optimal conditions for introspection. Where the experimental method failed, he turned to other objectively valuable aids, specifically to those products of cultural communal life which lead one to infer particular mental motives. Outstanding among these are speech, myth, and social custom. Wundt designed the basic mental activity apperception—a unifying function which should be understood as an activity of the will. Many aspects of his empirical physiological psychology are used today. One is his principles of mutually enhanced contrasts and of assimilation and dissimilation (i.e. in color and form perception and his advocacy of objective methods of expression and of recording results, especially in language. Another is the principle of heterogony of ends—that multiply motivated acts lead to unintended side effects which in turn become motives for new actions.

Charles Sanders Peirce

C.S. Peirce published the first full statement of pragmatism in his important works "How to Make Our Ideas Clear" (1878) and "The Fixation of Belief" (1877). In "How to Make Our Ideas Clear" he proposed that a clear idea (in his study he uses concept and idea as synonymic) is defined as one, when it is apprehended such as it will be recognized wherever it is met, and no other will be mistaken for it. If it fails of this clearness, it is said to be obscure. He argued that to understand an idea clearly we should ask ourselves what difference its application would make to our evaluation of a proposed solution to the problem at hand. Pragmatism (a term he appropriated for use in this context), he defended, was a method for ascertaining the meaning of terms (as a theory of meaning). The originality of his ideas is in their rejection of what was accepted as a view and understanding of knowledge by scientists for some 250 years, i.e. that, he pointed, knowledge was an impersonal fact. Peirce contended that we acquire knowledge as participants, not as spectators. He felt "the real" is which, sooner or later, information acquired through ideas and knowledge with the application of logical reasoning would finally result in. He also published many papers on logic in relation to ideas.

G.F. Stout and J.M. Baldwin

G.F. Stout and J.M. Baldwin, in the Dictionary of Philosophy and Psychology , define idea as "the reproduction with a more or less adequate image, of an object not actually present to the senses." They point out that an idea and a perception are by various authorities contrasted in various ways. "Difference in degree of intensity", "comparative absence of bodily movement on the part of the subject", "comparative dependence on mental activity", are suggested by psychologists as characteristic of an idea as compared with a perception.

It should be observed that an idea, in the narrower and generally accepted sense of a mental reproduction, is frequently composite. That is, as in the example given above of the idea of chair, a great many objects, differing materially in detail, all call a single idea. When a man, for example, has obtained an idea of chairs in general by comparison with which he can say "This is a chair, that is a stool", he has what is known as an "abstract idea" distinct from the reproduction in his mind of any particular chair (see abstraction). Furthermore a complex idea may not have any corresponding physical object, though its particular constituent elements may severally be the reproductions of actual perceptions. Thus the idea of a centaur is a complex mental picture composed of the ideas of man and horse, that of a mermaid of a womanand a fish.

Validity of ideas

In the objective worth of our ideas there remains the problem of the validity. As all cognition is by ideas, it is obvious that the question of the validity of our ideas in this broad sense is that of the truth of our knowledge as a whole. Otherwise to dispute this is to take up the position ofskepticism. This has often been pointed out as a means of intellectual suicide. Any chain of reasoning (common sense) by which we attempt to demonstrate the falsity of our ideas has to employ the very concept of ideas itself. Then insofar as such reasoning demands assent to the conclusion, it implies belief in the validity of all the ideas employed in the premises of the argument.

To assent the fundamental mathematical and logical axioms, including that of the principle of contradiction, implies admission of the truth of the ideas expressed in these principles. With respect to the objective worth of ideas, as involved in perception generally, the question raised is that of the existence of an independent material world comprising other human beings. The idealism of David Hume and John Stuart Millwould lead logically to solipsism (the denial of any others besides ourselves). The main foundation of all idealism and skepticism is the assumption (explicit or implicit), that the mind can never know what is outside of itself. This is to say that an idea as a cognition can never go outside of itself. This can be further expressed as we can never reach to and mentally apprehend anything outside of anything of what is actually a present state of our own consciousness.

• First, this is based on a prior assumption for which no real proof is or can be given
• Second, it is not only not self-evident, but directly contrary to what our mind affirms to be our direct intellectual experience.

What is possible for a human mind to apprehend cannot be laid down beforehand. It must be ascertained by careful observations and by study of the process of cognition. This postulates that the mind cannot apprehend or cognize any reality existing outside of itself and is not only a self-evident proposition, it is directly contrary to what such observation and the testimony of mankind affirms to be our actual intellectual experience.

John Stuart Mill and most extreme idealists have to admit the validity of memory and expectation. This is to say that in every act of memory or expectation which refers to any experience outside the present instant, our cognition is transcending the present modifications of the mind and judging about reality beyond and distinct from the present states of consciousness. Considering the question as specially concerned with universal concepts, only the theory of moderate realism adopted by Aristotle and Saint Thomas can claim to guarantee objective value to our ideas. According to the nominalist and conceptualist theories there is no true correlate in rerum naturâ corresponding to the universal term.

Mathematics, astronomy, physics, chemistry, and the rest claim that their universal propositions are true and deal with realities. It is involved in the very notion of science that the physical laws formulated by the mind do mirror the working of agents in the external universe. The general terms of these sciences and the ideas which they signify have objective correlatives in the common natures and essences of the objects with which these sciences deal. Otherwise these general statements are unreal and each science is nothing more than a consistently arranged system of barren propositions deduced from empty arbitrary definitions. These postulates then have no more genuine objective value than any other coherently devised scheme of artificial symbols standing for imaginary beings. However the fruitfulness of science and the constant verifications of its predictions are incompatible with such a hypothesis.

A picture of a lightbulb is often used to represent a person having an idea