A set of guidelines instructing the police about how to question suspects so that the resulting evidence is admissible in court.

Synonym of island rule

Alternative form of Markovnikov's rule

(poker) The rule of multiplying the number of outs by four to discover one's approximate chance to make one's hand on the turn or river. Compare rule of two.

(poker) The rule of multiplying the number of outs by two to discover one's approximate chance to make one's hand on the river.

(cellular automata) A simple cellular automaton, unusual in being Turing-complete, where each cell's value changes depending on its current value and those of two neighbouring cells.

(very rare) plural of Cramer's rule

(linear algebra) An explicit formula for the solution of a system of linear equations with as many equations as unknowns, valid whenever the system has a unique solution.

(mathematics) The rule that the limit of the ratio of two functions equals the limit of the ratio of their derivatives, usable when the former limit is indeterminate and the latter limit exists.

An instrument consisting of a rule or frame, and a plumb line, by which the batter or slope of a wall is regulated in building.