Attributed to William of Ockham, a 14th-century English philosopher and theologian. >*Entia non sunt multiplicanda praeter necessitatem.* This translates as "Entities must not be multiplied beyond necessity", although Occam never used these exact words. This is often paraphrased as "The simplest explanation is usually the best one." Also known as the *parsimony principle*, this problem-solving technique suggests we search for explanations constructed with the smallest possible set of elements. >"A theory should be made as simple as possible, but not simpler." >*— Albert Einstein*