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A principle may relate to a fundamental truth or proposition that serves as the foundation for a system of beliefs or behavior or a chain of reasoning...

The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is...

The Principle is a 2014 American independent film produced by Rick DeLano and Robert Sungenis. It rejects the Copernican principle and supports the long-superseded...

The Peter principle is a concept in management developed by Laurence J. Peter which observes that people in a hierarchy tend to rise to "a level of respective...

Archimedes' principle (also spelled Archimedes's principle) states that the upward buoyant force that is exerted on a body immersed in a fluid, whether...

In law, an agreement in principle is a stepping stone to a contract. Such agreements with regard to the principle are usually considered fair and equitable...

is a design principle first noted by the U.S. Navy in 1960. First seen partly in American English by at least 1938, the KISS principle states that most...

The principle of plenitude asserts that the universe contains all possible forms of existence. Arthur Lovejoy, a historian of ideas, was the first to...

Bernoulli's principle is a key concept in fluid dynamics that relates pressure, speed and height. Bernoulli's principle states that an increase in the...

The equivalence principle is the hypothesis that the observed equivalence of gravitational and inertial mass is a consequence of nature. The weak form...

The instantiation principle or principle of instantiation or principle of exemplification is the concept in metaphysics and logic (first put forward by...

Fermat's principle, also known as the principle of least time, is the link between ray optics and wave optics. Fermat's principle states that the path...

Pleasure Principle may refer to: Pleasure principle (psychology), a psychoanalytical term coined by Sigmund Freud Pleasure Principle (fashion), a New...

D'Alembert's principle, also known as the Lagrange–d'Alembert principle, is a statement of the fundamental classical laws of motion. It is named after...

The harm principle holds that the actions of individuals should be limited only to prevent harm to other individuals. John Stuart Mill articulated the...

The territorial principle (also territoriality principle) is a principle of public international law which enables a sovereign state to exercise exclusive...

The Pareto principle (also known as the 80/20 rule, the law of the vital few and the principle of factor sparsity) states that for many outcomes, roughly...

Principle of legality may refer to: Principle of legality in criminal law, legal doctrine requiring a prior published law before someone can be convicted...

Duality principle or principle of duality may refer to: Duality (projective geometry) Duality (order theory) Duality principle (Boolean algebra) Duality...

The Oz Principle: Getting Results Through Individual and Organizational Accountability is a leadership book written by Roger Connors, Tom Smith, and Craig...