Note 149 — Chapter IV · SPACE AND TIME

This may be brought home even to those who, like myself, are not mathematicians, by the perusal of such a work as Lobatchevsky’s Untersuchungen zur Theorie der Parallel-Linien, where a consistent geometry of triangles is constructed in entire independence of the postulate of parallelism. Of course, in the end it must be a mere question of nomenclature whether a form of serial order independent of these quasi-empirical restrictions is to be called “space” or not.