Caveat emptor effect that the initial transfer or license of intellectual-property rights is preserved. Most stores require proof of purchase and impose time limits on exchanges or refunds. Some larger chain stores, such as F.Y.E., Staples, Target, or Walmart, will, however, do exchanges or refunds at any time, with or without proof of purchase, although they usually require a form of picture identification and place per-transaction and/or per-person quantity or dollar limitations on such returns. In the UK, consumer law has moved away from the "caveat emptor" model, with laws passed that have enhanced consumer rights and allow greater leeway to return
The purpose of a system is what it does be balanced by a more straightforwardly descriptive view. The term is used in many fields including biology and management. The purpose of a system is what it does The purpose of a system is what it does (POSIWID) is a systems thinking heuristic coined by Stafford Beer. Stafford Beer coined the term POSIWID and used it many times in public addresses. In his address to the University of Valladolid, Spain, in October 2001, he said "According to the cybernetician, the purpose of a system is what it does. This is a basic dictum. It stands for bald fact, which makes