What is OPH?
OPH is a rigorous, consistent and complete description of the unified, self-creating computational Universe we inhabit. The letters stand for Observer Patch Holography. It starts with observers, bounded systems that read their surroundings, keep records and settle disagreements with their neighbors, and it assumes no space, time, fields or measured constants. Where two observers overlap, their records must agree. Objective reality is what their shared records read out once disagreements are repaired. Whatever persists under that repair is physics: conserved totals, three directions of space, clocks that agree, fields, and particles, which are knots no repair can undo. Holography names the fact that all anyone learns about a region arrives through its surface. The lowest layer is one fixed rule of repair and memory, and it runs on a laptop. Nothing outside runs the world. It computes itself, and its observers close the loop by recovering its law from their records and building the screen that computes them.
Also in Prologue: No Source Code, No Documentation, 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 1: Why Is the Universe So Hard to Reverse Engineer?watch a universe make its own particles