 In “An Examination of Tenses” (1956a), Findlay gives reasons for retaining the tensed system. The dated system implies a “block universe” of events pinned at unchanging locations in space-time. But the essence of time is change. Furthermore, and more interestingly, Findlay argues that a block universe cannot explain the fact that we know so much more about the past than the future, and that this asymmetry is not inferable from the structure of space-time or the laws relating events within it. (Findlay cites Ehrenfels [1916] for noticing that all the basic laws of physics are time symmetric.) Findlay proposes his own explanation of the asymmetry: collisions between particular substances changes their configuration, and these changes, or “traces” provide evidence in the present for collisions in the past. (This explanation of temporal asymmetry via traces is distinct from claiming that the collisions release heat and increase entropy, which would reduce temporal asymmetry to principles of thermodynamics.) General principles are not involved, only the historical facts of particular collisions when world lines criss-cross. Why are there no present traces of the future events? Because future collision have not yet occurred.