 In 1662 , the book La <unk> ou l ’ Art de <unk> was published anonymously in Paris . The authors presumably were Antoine Arnauld and Pierre Nicole , two leading <unk> , who worked together with Blaise Pascal . The Latin title of this book is Ars <unk> , which was a successful book on logic of the time . The Ars <unk> consists of four books , with the fourth one dealing with decision @-@ making under uncertainty by considering the analogy to gambling and introducing explicitly the concept of a quantified probability . 
