A form of modal logic whose operators reflect various aspects of this phenomenon was developed by Arthur Prior.
In 2002, Huw Price established a center for the study of this concept at the University of Sydney. A form of modal logic whose operators reflect various aspects of this phenomenon was developed by Arthur Prior. Peter van Inwagen called himself a "threeist" in a paper that attempted to establish a theory of identity relative to this phenomenon via a thought experiment involving a "flatlander" version of Descartes. Section II of the Critique of Pure Reason, which is dedicated to this concept, calls it "nothing else than the form of the internal sense," rather than any "determination of outward phenomena," as well as "the formal condition a priori of all phenomena whatsoever."  A famous argument about this phenomenon divides it into an A-series and a B-series, and argues that although the A-series is necessary for it to exist, the existence of the A-series leads to a contradiction, and therefore this phenomenon is illusory. For 10 points, identify this phenomenon which does not exist according to an argument by John McTaggart.
In 2002, Huw Price established a center for the study of this concept at the University of Sydney.
time