Advantage #5 of 3DT over String Theory

Another point of similarity between Three Dimensions of Time (3DT) and general relativity is that both have the curvature scalar as their Lagrangian. 3DT's curvature scalar is in six dimensions and includes all known and predicted matter fields. This means all matter is just part of the geometry of a six-dimensional world. In other words, in six dimensions there is no matter, only geometry. This is the achievement of Einstein's dream of describing everything in terms of the "marble" of geometry alone, without the "base wood" of fundamentally different matter fields. This is in contrast to String Theory, which has ad hoc matter fields.