Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Occam''s razor (or Ockham''s razor), entia non sunt multiplicanda praeter necessitatem, is the principle that entities must not be multiplied beyond necessity" and the conclusion thereof, that the simplest explanation or strategy tends to be the best one. The principle is attributed to 14th-century English logician, theologian and Franciscan friar, William of Ockham. Occam''s razor may be alternatively phrased as pluralitas non est ponenda sine necessitate ("plurality should not be posited without necessity").The principle is often expressed in Latin as the lex parsimoniae (translating to the law of parsimony, law of economy or law of succinctness). When competing hypotheses are equal in other respects, the principle recommends selection of the hypothesis that introduces the fewest assumptions and postulates the fewest entities while still sufficiently answering the question. "