Hand (unit) radix numbering system, where a hand is four inches. The hand, sometimes also called a handbreadth or handsbreadth, is an anthropic unit, originally based on the breadth of a male human hand, either with or without the thumb, or on the height of a clenched fist. On surviving Ancient Egyptian cubit-rods, the royal cubit is divided into seven palms of four digits or fingers each. Five digits are equal to a hand, with thumb; and six to a closed fist. The royal cubit measured approximately 525 mm, so the length of the ancient Egyptian hand was about 94 mm. In
Unit measure Unit measure Unit measure is an axiom of probability theory that states that the probability of the entire sample space is equal to one (unity); that is, "P"("S")=1 where "S" is the sample space. Loosely speaking, it means that "S" must be chosen so that when the experiment is performed, "something" happens. The term "measure" here refers to the measure-theoretic approach to probability. Violations of unit measure have been reported in arguments about the outcomes of events under which events acquire "probabilities" that are not the probabilities of probability theory. In situations such as these the term "probability" serves as