Dual expression of collapse
Derived Derived. It is a consequence of the collapse branch at a junction, not a second bifurcation.
Source: Style sheet v22 §1.1 (Substrate §2)
Definition (canon)
A consequence of taking the collapse branch, not a second bifurcation: because the node sits at a junction, its collapse releases both downstream arms at once, so failure appears as two lesions.
In plain words
One failure at a junction looks like two failures, because it lets go of both things downstream of it at once.
It is not
- Two independent failures that happened together.
- A second decision. The branch was taken once, at the node.
What would defeat it
- Follows from the definition. A double lesion traced to two separate nodes with no shared junction.