Then in the early 20th century, Jan Lukasiewicz proposed a three-valued logic (true, possible, false), which never gained wide acceptance. In 1965, Lotfi A. Zadeh of the University of California at ...

This week, the Center for Politics' "Crystal Ball" released the latest iteration of Professor Alan Abramowitz's "Time for Change" model, based on the past 16 presidential elections (dating to 1948).