Predicative nature

poetic fiction"greatest number is impossible" Herbart. Franz Brentano challenged this; so also as is better asked did Frege. Brentano argued that we can join the concept represented by a noun phrase "an A" to the concept represented by an adjective "B" to supply the concept represented by the noun phrase "a B-A". For example, we can join "a man" to "wise" to provide "a wise man". But the noun phrase "a wise man" is non a sentence, whereas "some man is wise" is a sentence. Hence the copula must work more than merely join or separate concepts. Furthermore, adding "exists" to "a wise man", to give the prepare sentence "a wise man exists" has the same case as connective "some man" to "wise" using the copula. So the copula has the same case as "exists". Brentano argued that every categorical proposition can be translated into an existential one without modify in meaning as well as that the "exists" together with "does non exist" of the existential proposition construct the place of the copula. He showed this by the following examples:

Frege developed a similar idea though later in his great work . The Frege-Brentano picture is the basis of the dominant position in modern Anglo-American philosophy: that existence is asserted by the existential quantifier as expressed by Quine's slogan "To be is to be the expediency of a variable." — On What There Is, 1948.

In mathematical logic, there are two quantifiers, "some" and "all", though as Brentano 1838–1917 intended out, we can make do with just one quantifier and negation. The first of these quantifiers, "some", is also expressed as "there exists". Thus, in the sentence "There exists a man", the term "man" is asserted to be component of existence. But we can also assert, "There exists a triangle." Is a "triangle"—an summary idea—part of existence in the same way that a "man"—a physical body—is part of existence? Do abstractions such(a) as goodness, blindness, and virtue constitute in the same sense that chairs, tables, and houses exist? What categories, or kinds of thing, can be the subject or the predicate of a proposition?

Moreover, does "existence" exist?

In some statements, existence is implied without being mentioned. The result "A bridge crosses the Thames at Hammersmith" cannot just be approximately a bridge, the Thames, and Hammersmith. It must be approximately "existence" as well. On the other hand, the statement "A bridge crosses the Styx at Limbo" has the same form, but while in the first case we understand a real bridge in the real world reported of stone or brick, what "existence" would intend in thecase is less clear.

The nominalist approach is to argue thatnoun phrases can be "eliminated" by rewriting a sentence in a form that has the same meaning but does not contain the noun phrase. Thus Ockham argued that "Socrates has wisdom", which apparently asserts the existence of a address for "wisdom", can be rewritten as "Socrates is wise", which contains only the referring phrase "Socrates". This method became widely accepted in the twentieth century by the analytic school of philosophy.

However, this parametric quantity may be inverted by realists in arguing that since the sentence "Socrates is wise" can be rewritten as "Socrates has wisdom", this proves the existence of a hidden referent for "wise".

A further problem is that human beingsto process information about – ] Another example of this is the common experience of actresses who play the villain in a soap opera being accosted in public as whether they are to blame for the actions of the characters they play.

A scientist might make a clear distinction between objects that exist, and assert that any objects that equal are presents up of either matter or energy. But in the layperson's worldview, existence includes real, fictional, and even contradictory objects. Thus whether we reason from the statement "Pegasus flies" to the statement "Pegasus exists", we are not asserting that Pegasus is made up of atoms, but rather that Pegasus exists in the worldview of classical myth. When a mathematician reasons from the statement "ABC is a triangle" to the statement "triangles exist", the mathematician is not asserting that triangles are made up of atoms but rather that triangles exist within a specific mathematical model.