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  2. Outline (list) - Wikipedia

    en.wikipedia.org/wiki/Outline_(list)

    Outline (list) An outline, also called a hierarchical outline, is a list arranged to show hierarchical relationships and is a type of tree structure. An outline is used [ 1] to present the main points (in sentences) or topics ( terms) of a given subject. Each item in an outline may be divided into additional sub-items.

  3. Catch-22 (logic) - Wikipedia

    en.wikipedia.org/wiki/Catch-22_(logic)

    Catch-22 (logic) A flowchart showing Joseph Heller's original Catch-22. A catch-22 is a paradoxical situation from which an individual cannot escape because of contradictory rules or limitations. [ 1] The term was coined by Joseph Heller, who used it in his 1961 novel Catch-22 .

  4. Plot (narrative) - Wikipedia

    en.wikipedia.org/wiki/Plot_(narrative)

    Plot (narrative) Plot is the cause‐and‐effect sequence of main events in a story. [ 1] Story events are numbered chronologically while red plot events are a subset connected logically by "so". In a literary work, film, or other narrative, the plot is the sequence of events in which each event affects the next one through the principle of ...

  5. Phrase structure rules - Wikipedia

    en.wikipedia.org/wiki/Phrase_structure_rules

    Phrase structure rules. Phrase structure rules are a type of rewrite rule used to describe a given language's syntax and are closely associated with the early stages of transformational grammar, proposed by Noam Chomsky in 1957. [1] They are used to break down a natural language sentence into its constituent parts, also known as syntactic ...

  6. List of paradoxes - Wikipedia

    en.wikipedia.org/wiki/List_of_paradoxes

    Shows that a sentence can be paradoxical even if it is not self-referring and does not use demonstratives or indexicals. Yablo's paradox: An ordered infinite sequence of sentences, each of which says that all following sentences are false. While constructed to avoid self-reference, there is no consensus whether it relies on self-reference or not.

  7. Why telling time on the moon is a conundrum for NASA - AOL

    www.aol.com/news/why-know-time-moon-183338834.html

    Determining a lunar time scale will be even more challenging. The new system of measurement that NASA and its international partners need to agree on will have to account for the fact that seconds ...

  8. Outline of logic - Wikipedia

    en.wikipedia.org/wiki/Outline_of_logic

    Outline of logic. Logic is the formal science of using reason and is considered a branch of both philosophy and mathematics and to a lesser extent computer science. Logic investigates and classifies the structure of statements and arguments, both through the study of formal systems of inference and the study of arguments in natural language.

  9. Conundrum - Wikipedia

    en.wikipedia.org/wiki/Conundrum

    Look up conundrum in Wiktionary, the free dictionary. Conundrum may refer to: A riddle, whose answer is or involves a pun or unexpected twist, in particular. Riddle joke, a riddle that constitutes a set-up to the humorous punch line of a joke. A logical postulation that evades resolution, an intricate and difficult problem.