Stub Causality Fork Rule

Stub因果分叉规则 is the account of how a server connection creates a separate causal branch rather than opening a route into the originating world’s past. It makes cross-continuum contact possible while limiting what that contact can change: information may travel between branches, but events in the branch do not alter the history of the world from which it split. The distinction underpins both the political use of stubs and the uncertainty of attempts to steer their futures.

The Fork and Its Consequences

Lev Zubov explains the rule as a fork in causality: making a connection produces a new branch that is causally unique, which the users call a stub. A person in that branch may appear to be living in the past, but the connection did not happen in the originating world’s own past. It happened at a point where causality divided. From then on, the branch is not simply an earlier version of the world that initiated contact; it has its own unfolding history.

That difference answers the apparent paradox of encountering people who are alive in a time that seems to precede the server users’ present. The branch may resemble an earlier world, but its events do not replace or revise the originating continuum’s history. Lev makes this limit explicit when he says that nothing that happens there can affect the world from which the connection began. The stub’s separate causal status is therefore not a loophole for changing an established past.

Communication Without Time Travel

The server’s operation also fixes the pace of the connection. As Ash explains, the first email establishes a one-to-one ratio of duration between the stub and the originating continuum. A given interval in one is the same interval in the other, measured from the first instant of contact. The connection cannot be used to jump forward in the stub, inspect its future, and return with foreknowledge: that would be time travel, not the server’s form of communication. Its users cannot know the stub’s future any more securely than they can know their own.

Information, however, can pass in both directions. This qualification gives the rule its strategic force. When someone seeks to kill a man in a stub even though the man is already dead in the originating world, the apparent contradiction is explained by the possibility that he witnessed or learned something whose information could threaten people here. The branch cannot send its events back to change the past, but information associated with those events can matter across the divide. The difference between changing history and learning from another continuum drives the investigation’s stakes.

Broad Influence, Uncertain Outcomes

The rule permits limited influence after the fork, not exact reconstruction or control. Lowbeer’s view is that an event such as Felicia Gonzales’s assassination was pivotal in the deepening Jackpot. Because the two continuums have diverged, the originating world is not simply repeating a settled history. Its course can be steered to some extent, but only broadly, and there is no guarantee of the result. Preventing the assassination is treated as a necessary step toward ameliorating the Jackpot, not as a means of ensuring a known, better future.

The same uncertainty shapes the economic contest involving Coldiron and Matryoshka. Their competition over ownership of the stub world plays out through rapid financial events, while Coldiron’s effort to develop advanced technology carries its own risk: introducing too much too quickly could destabilize the world it hopes to influence. The rule thus frames intervention as a chain of consequential choices rather than a return to a fixed timeline. A branch is open to pressure, but its future remains its own.

Naming and Power

The word stub itself exposes an ethical tension within the rule. Lowbeer asks why users call a branch by a term that sounds short-lived, when they expect it to continue growing. Lev agrees that they do expect the branch to grow, while admitting that he does not know why enthusiasts settled on the name. Ash calls the practice a form of imperialism: those with access are treating alternate continuums as worlds to be exploited, and the dismissive label helps make that treatment easier.

That critique is borne out by the uses to which the branch is put. Lev and his collaborators regard the server as a means of communicating with another continuum, while powerful interests compete to shape its ownership and future. The rule’s division of causality prevents direct revision of the originating world’s past, but it does not make the branch politically inconsequential. On the contrary, its independent future becomes the object of financial competition, technological intervention, and efforts to avert a larger catastrophe. The rule’s central limit and its central danger are inseparable: the stub cannot be made into the original world’s past, yet people in the originating world can still try to make its future serve their purposes.