The most important debate between twentieth-century philosophers of time has been whether events that have happened, are happening, or will happen are equally real (the tenseless theory of time) or whether there is a fundamental distinction between past, present, and future, with only present events possessing full existence (the tensed theory). In the 1980s a new version of the tenseless theory of time emerged. While advocates still posit that all events are equally real, they depart from the old tenseless theory by conceding that tensed expressions cannot be translated into tenseless ones,...