Why are there three generations of matter?
Three is the rank of the cheapest band on an observer patch able to carry a family's threefold turn. The patch sits on a solid of twenty triangles, each with a threefold rotation cycling its corners, and a family is a direction a particle's core can occupy in such a band. Its twelve directions split into pieces of one, three, three and five; the size-one piece carries no phase, and the others cost 5 − √5, 6 and 5 + √5, so the cheapest has rank three. Matter and antimatter differ, which takes at least three families, and keeping the weak force feebler at short range allows at most five. Matching that band to the observed generations is work in progress. The copies weigh differently because mass is an exponential of how many ticks a core survives between repairs.
Also in Chapter 33: Why Was Every Open Problem the Same Problem?.
This answer comes from OPH, Observer Patch Holography. OPH is a rigorous, consistent and complete description of the unified, self-creating computational Universe we inhabit. Its consistency is machine-checked: the fixed point at its core is constructed explicitly, and a theory with a model contains no contradiction.
To understand OPH and check every step yourself, start with the free book Reverse Engineering Reality. It builds the theory from the ground up, and the OPH Notebook answers your questions while you read.
read the free bookask the notebookor ask sage:read chapter 27: Why This Exact List of Matter, and Why Three Times Over?watch a universe make its own particles