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  2. Rule of threes (survival) - Wikipedia

    en.wikipedia.org/wiki/Rule_of_threes_(survival)

    Training in use of a liferaft – the rule will apply when exposed at sea. In survival, the rule of threes involves the priorities in order to survive. [1] [2] [3] The rule, depending on the place where one lives, may allow people to effectively prepare for emergencies [4] and determine decision-making in case of injury or danger posed by the environment.

  3. List of grandfather clauses - Wikipedia

    en.wikipedia.org/wiki/List_of_grandfather_clauses

    A grandfather clause (or grandfather policy or grandfathering) is a provision in which an old rule continues to apply to some existing situations while a new rule will apply to all future cases. Those exempt from the new rule are said to have grandfather rights or acquired rights , or to have been grandfathered in .

  4. Clause (logic) - Wikipedia

    en.wikipedia.org/wiki/Clause_(logic)

    In logic, a clause is a propositional formula formed from a finite collection of literals (atoms or their negations) and logical connectives.A clause is true either whenever at least one of the literals that form it is true (a disjunctive clause, the most common use of the term), or when all of the literals that form it are true (a conjunctive clause, a less common use of the term).

  5. List of clauses of the United States Constitution - Wikipedia

    en.wikipedia.org/wiki/List_of_clauses_of_the...

    The United States Constitution and its amendments comprise hundreds of clauses which outline the functioning of the United States Federal Government, the political relationship between the states and the national government, and affect how the United States federal court system interprets the law. When a particular clause becomes an important ...

  6. Horn clause - Wikipedia

    en.wikipedia.org/wiki/Horn_clause

    Horn clauses are also the basis of logic programming, where it is common to write definite clauses in the form of an implication: ( p ∧ q ∧ ... ∧ t ) → u In fact, the resolution of a goal clause with a definite clause to produce a new goal clause is the basis of the SLD resolution inference rule, used in implementation of the logic ...

  7. Survival function - Wikipedia

    en.wikipedia.org/wiki/Survival_function

    The survival function is also known as the survivor function [2] or reliability function. [3] The term reliability function is common in engineering while the term survival function is used in a broader range of applications, including human mortality. The survival function is the complementary cumulative distribution function of the lifetime ...

  8. Conjunctive normal form - Wikipedia

    en.wikipedia.org/wiki/Conjunctive_normal_form

    In Boolean logic, a formula is in conjunctive normal form (CNF) or clausal normal form if it is a conjunction of one or more clauses, where a clause is a disjunction of literals; otherwise put, it is a product of sums or an AND of ORs.

  9. Definite clause grammar - Wikipedia

    en.wikipedia.org/wiki/Definite_clause_grammar

    A definite clause grammar (DCG) is a way of expressing grammar, either for natural or formal languages, in a logic programming language such as Prolog. It is closely related to the concept of attribute grammars / affix grammars .