 Logical construction is a process of discovery, not of manipulation: to logically construct xs out of ys is to discover that ys, when they manifest a certain type of structure, can play the role of xs. Russell’s constructions of a point in space, an instant in time, a table, and of a belief may illustrate the procedure. (i) A Russian doll is a good model of how Russell (following Whitehead) proposes to construct a point in space. The rough idea is to take “the class of all those objects which, as one would naturally say, contain the point” (Russell 1914a: 117) and to substitute this class of nested objects (the structure of ys) for points in space (the xs). (ii) Experienced instants in time (the xs) are constructed by discovering that the experiences of a person, each of which is extended in time, can overlap each other in ways that converge on an instant. It is 