History of male circumcision of the glans. Later during the Talmudic period (500–625 CE) a third step, known as "Metzitzah", began to be practiced. In this step the "mohel" would suck the blood from the circumcision wound with his mouth to remove what was believed to be bad excess blood. As it actually increases the likelihood of infections such as tuberculosis and venereal diseases, modern day mohels use a glass tube placed over the infant's penis for suction of the blood. In many Jewish ritual circumcisions this step of Metzitzah has been eliminated. First Maccabees tells us that the Seleucids forbade the practice of
The purpose of a system is what it does 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 a better starting point in seeking understanding than the familiar attributions of good intention, prejudices about expectations, moral judgment,