metaphysics

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在记忆可以篡改、肉身可以复制的世界里，“自我”的同一性如何维系？

所以在这个背景下，遗世的历史就是当实现这个“外力”的“时间轴理论”被提出来后，遗世就再也不存在“时间”一说。这时就有一些核心技术被提出来，比如控制局域的时间怀表啊之类的东西能让破镜重圆等等。但实际上还有多时间理论，就是人们“做了一个决定”是或否的话，世界其实会分裂成两个(就是mwi的多世界理论，双缝干涉条纹不定态/薛定谔的猫这样的)

遗世其实像一个陀螺的形状，所处“宇宙”实际是一片虚无，轴城是中间的核，而析/蓝图/千方/消弦包围轴城成为螺旋体，而江南是悬浮在外面类似星环/陀螺环的地方，江南与虚空毗邻，江南也称为(外环)，其他几项成为(内环)，从外环到内环实际上也需要跨过一小段虚空，但遗世称作“星河”

所处的“虚空”实际上是超级无敌多的遗世所在的一个极度抽象的“空间”。

In Ethreal, time is not a line but a fold. Each instant carries with it a manifold of un-actualized neighbors — variations that almost happened. The density of these neighbors at any point is the grain of that moment.

The grain equation

Let $\mathcal{M}_t$ be the manifold of plausible histories at time $t$ . The grain density $\rho$ is defined by:

\rho(\mathbf{x}, t) = \int_{\mathcal{M}_t} \exp\left(-\frac{S[\gamma]}{\hbar^\star}\right) \, \mathcal{D}\gamma

where $S[\gamma]$ is the narrative action along a candidate history $\gamma$ , and $\hbar^\star$ is Ethreal’s coarse-graining constant (distinct from the $\hbar$ of our world).

When $\rho$ is high, the present is thick — full of nearly-happened things. When $\rho$ is low, the present is thin, and reality feels brittle. The peoples of the Late Third Spiral live in a thin time.

Practical consequences

Memory is partly recall, partly invention. Memory queries the local $\mathcal{M}_t$ , not a fixed record. Two people can sincerely remember incompatible events.
Prophecy is gradient descent on $\rho$ . A prophet does not see the future — they walk downhill on the grain field.
The dead persist as boundary conditions. A sufficiently insistent absence reshapes the local manifold.

The grain equation

Practical consequences

See also