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In philosophy and the arts, a fundamental distinction is between things that are abstract and things that are concrete.While there is no general consensus as to how to precisely define the two, examples include that things like numbers, sets, and ideas are abstract objects, while plants, dogs, and planets are concrete objects. [1]
Object abstraction, or simply abstraction, is a concept wherein terms for objects become used for more abstract concepts, which in some languages develop into further abstractions such as verbs and grammatical words (grammaticalisation). Abstraction is common in human language, though it manifests in different ways for different languages.
A noun might have a literal (concrete) and also a figurative (abstract) meaning: "a brass key" and "the key to success"; "a block in the pipe" and "a mental block". Similarly, some abstract nouns have developed etymologically by figurative extension from literal roots (drawback, fraction, holdout, uptake).
A physical object (a possible referent of a concept or word) is considered concrete (not abstract) if it is a particular individual that occupies a particular place and time. However, in the secondary sense of the term 'abstraction', this physical object can carry materially abstracting processes.
For example, the English plural marker has three allomorphs: /-z/ (bugs), /-s/ (bats), or /-ɪz,-əz/ (buses). An allomorph is a concrete realization of a morpheme, which is an abstract unit. That is parallel to the relation of an allophone and a phoneme.
Moreover, studies that have been conducted on abstract and concrete words have also found that the participants remembered concrete words better than the abstract words. [ 8 ] [ 9 ] [ 10 ] Paivio found that participants when shown a rapid sequence of pictures as well as a rapid sequence of words and later asked to recall the words and pictures ...
A tongue-in-cheek reference to category theory, using which one can employ arguments that establish a (possibly concrete) result without reference to any specifics of the present problem. For that reason, it is also known as general abstract nonsense or generalized abstract nonsense.
Some lists of common words distinguish between word forms, while others rank all forms of a word as a single lexeme (the form of the word as it would appear in a dictionary). For example, the lexeme be (as in to be) comprises all its conjugations (is, was, am, are, were, etc.), and contractions of those conjugations. [5]