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  2. Essay - Wikipedia

    en.wikipedia.org/wiki/Essay

    Essay. An essay is, generally, a piece of writing that gives the author's own argument, but the definition is vague, overlapping with those of a letter, a paper, an article, a pamphlet, and a short story. Essays have been sub-classified as formal and informal: formal essays are characterized by "serious purpose, dignity, logical organization ...

  3. Formal language - Wikipedia

    en.wikipedia.org/wiki/Formal_language

    t. e. Structure of the syntactically well-formed, although thoroughly nonsensical, English sentence, "Colorless green ideas sleep furiously" (historical example from Chomsky 1957) In logic, mathematics, computer science, and linguistics, a formal language consists of words whose letters are taken from an alphabet and are well-formed according ...

  4. Letter (message) - Wikipedia

    en.wikipedia.org/wiki/Letter_(message)

    A letter is a written message conveyed from one person (or group of people) to another through a medium. [1] Something epistolary means that it is a form of letter writing. The term usually excludes written material intended to be read in its original form by large numbers of people, such as newspapers and placards, although even these may ...

  5. Formal contract - Wikipedia

    en.wikipedia.org/wiki/Formal_contract

    Formal contract. A formal contract is a contract where the parties have signed under seal, while an informal contract [1] is one not under seal. A seal can be any impression made upon the document by the parties to the contract. This was traditionally done in wax stating the intentions of the parties to be bound by the contract.

  6. Logic - Wikipedia

    en.wikipedia.org/wiki/Logic

    Logic. Logic studies valid forms of inference like modus ponens. Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the study of deductively valid inferences or logical truths. It examines how conclusions follow from premises based on the structure of arguments alone, independent of their topic ...

  7. Contraction (grammar) - Wikipedia

    en.wikipedia.org/wiki/Contraction_(grammar)

    Contraction (grammar) A contraction is a shortened version of the spoken and written forms of a word, syllable, or word group, created by omission of internal letters and sounds. In linguistic analysis, contractions should not be confused with crasis, abbreviations and initialisms (including acronyms), with which they share some semantic and ...

  8. Formal grammar - Wikipedia

    en.wikipedia.org/wiki/Formal_grammar

    t. e. A formal grammar describes which strings from an alphabet of a formal language are valid according to the language's syntax. A grammar does not describe the meaning of the strings or what can be done with them in whatever context—only their form. A formal grammar is defined as a set of production rules for such strings in a formal language.

  9. List of fallacies - Wikipedia

    en.wikipedia.org/wiki/List_of_fallacies

    List of paradoxes. Outline of public relations – Overview of and topical guide to public relations. Map–territory relation – Relationship between an object and a representation of that object (confusing map with territory, menu with meal) Mathematical fallacy – Certain type of mistaken proof.