Quantum Eraser and Delayed Choice
Restoring which-path information after a measurement seems to retroactively determine the past state of the quantum system — how can future action influence past events?
What the system says
Delayed choice involves worldframe re-inscription, not backward causation; the apparent retrocausality is a structural feature of how worldframes are coherently inhabited.
The system addresses this phenomenon by locating it within the broader structural account. The apparatus of worldframes, monadic inhabitation, and the disclosive/structural distinction provides the conceptual resources needed to dissolve or resolve the puzzle rather than simply describe it.
Existing positions in the literature
Standard approaches to this phenomenon in the philosophical and scientific literature face characteristic difficulties. The system's account does not simply choose among these positions but provides a structural diagnosis of why each fails and what a satisfactory account would require.