Linguistics

Epistemic modal logic is a subfield of modal logic that is concerned with reasoning about knowledge. While epistemology has a long philosophical tradition dating back to Ancient Greece, epistemic logic is a much more recent development with applications in many fields, including philosophy, theoretical computer science, artificial intelligence, economics, and linguistics. While philosophers since Aristotle have discussed modal logic, and Medieval philosophers such as Avicenna, Ockham, and Duns Scotus developed many of their observations, it was C. I. Lewis who created the first symbolic and systematic approach to the topic, in 1912. It continued to mature as a field, reaching its modern form in 1963 with the work of Saul Kripke.

The term predicate is used in two ways in linguistics and its subfields. The first defines a predicate as everything in a standard declarative sentence except the subject, and the other defines it as only the main content verb or associated predicative expression of a clause. Thus, by the first definition, the predicate of the sentence Frank likes cake is likes cake, while by the second definition, it is only the content verb likes, and Frank and cake are the arguments of this predicate. The conflict between these two definitions can lead to confusion.

A parameter (from Ancient Greek παρά (pará) 'beside, subsidiary' and μέτρον (métron) 'measure'), generally, is any characteristic that can help in defining or classifying a particular system (meaning an event, project, object, situation, etc.). That is, a parameter is an element of a system that is useful, or critical, when identifying the system, or when evaluating its performance, status, condition, etc.

Parameter has more specific meanings within various disciplines, including mathematics, computer programming, engineering, statistics, logic, linguistics, and electronic musical composition.

A priori ('from the earlier') and a posteriori ('from the later') are Latin phrases used in philosophy & linguistics to distinguish types of knowledge, justification, or argument by their reliance on experience. A priori knowledge is independent of any experience. Examples include mathematics, tautologies and deduction from pure reason. A posteriori knowledge depends on empirical evidence. Examples include most fields of science and aspects of personal knowledge.

The terms originate from the analytic methods found in Organon, a collection of works by Aristotle. Prior analytics (a priori) is about deductive logic, which comes from definitions and first principles. Posterior analytics (a posteriori) is about inductive logic, which comes from observational evidence.

The concept of Italic peoples is widely used in linguistics and historiography of ancient Italy. In a strict sense, commonly used in linguistics, it refers to the Osco-Umbrians and Latino-Faliscans, speakers of the Italic languages, a subgroup of the Indo-European language family. In a broader sense, commonly used in historiography, all the ancient peoples of Italy are referred to as Italic peoples, including the non-Indo-European ones, as Rhaetians, Ligures and Etruscans. As the Latins achieved a dominant position among these tribes, by virtue of the expansion of the Roman civilization, the other Italic tribes adopted Latin language and culture as part of the process of Romanization.

In linguistics, a grammatical gender system is a specific form of a noun class system, where nouns are assigned to gender categories that are often not related to the real-world qualities of the entities denoted by those nouns. In languages with grammatical gender, most or all nouns inherently carry one value of the grammatical category called gender. The values present in a given language, of which there are usually two or three, are called the genders of that language. Determiners, adjectives, and pronouns also change their form depending on the noun to which they refer.

According to one estimate, gender is used in approximately half of the world's languages.

Morphological derivation, in linguistics, is the process of forming a new word from an existing word, often by adding a prefix or suffix, such as un- or -ness. For example, unhappy and happiness derive from the root word happy.

It is differentiated from inflection, which is the modification of a word to form different grammatical categories without changing its core meaning: determines, determining, and determined are from the root determine.

In linguistics, an affix is a morpheme that is attached to a word stem to form a new word or word form. The main two categories are derivational and inflectional affixes. Derivational affixes, such as un-, -ation, anti-, pre- etc., introduce a semantic change to the word they are attached to. Inflectional affixes introduce a syntactic change, such as singular into plural (e.g. -(e)s), or present simple tense into present continuous or past tense by adding -ing, -ed to an English word. All of them are bound morphemes by definition; prefixes and suffixes may be separable affixes.

A referent (/ˈrɛfərənt/ REF-ər-ənt) is an entity to which a name – a linguistic expression or other symbol – refers. For example, in the sentence Mary saw me, the referent of the word Mary is the particular person called Mary who is being spoken of, while the referent of the word me is the person uttering the sentence.

Two expressions which have the same referent are said to be co-referential. In the sentence John had his dog with him, for instance, the noun John and the pronoun him are co-referential, since they both refer to the same person (John).

In linguistics, mutual intelligibility is a relationship between different but related language varieties in which speakers of the different varieties can readily understand each other without prior familiarity or special effort. Mutual intelligibility is sometimes used to distinguish languages from dialects, although sociolinguistic factors are often also used.

Intelligibility between varieties can be asymmetric; that is, speakers of one variety may be able to better understand another than vice versa. An example of this is the case between Afrikaans and Dutch. It is generally easier for Dutch speakers to understand Afrikaans than for Afrikaans speakers to understand Dutch.