Two ways of seeing the same reality: the familiar and the fundamental
The boundary of C = 0. Inside: causal connection is possible. Outside: C = 0, no causal link, no temporal ordering.
No grid. No background. Only events and the causal threads between them. Spacetime is the pattern that emerges when you step back and look at the web.
The light cone boundary IS the C = 0 surface. Inside, causal potential C rises as you move deeper into the timelike region. At an event horizon, C reaches its maximum.
Before spacetime. Only events and their causal connections. The "location" of events in space and time is a pattern that emerges from the structure of this web, not a pre-existing stage it sits on.
Moving from empty space toward a black hole: C rises from near-zero (sparse causal web, fast time) to C_max at the event horizon (total causal binding, time stops from outside).