  (1) The basic existents are things indexed by times, that is time-slices. What primarily exist are things-at-a-time: “\(a\) is red at \(t\)” is rendered “\(a\)-at-\(t\) is red”. Things that persist over time are then wholes made up of such parts, and one says that persisting things perdure rather than endure. This is the solution favoured by Lewis, by the present author, and by space-time theory.