The Page Torn Out: A Non-Closing Defect History, Computed

Paper #150 closed a door and named the shape of the next one. The vibrating figure eight carries no Nieh–Yan charge: at the eight's own ninety-degree crossing the density is zero at every instant, and at any other angle a bound vibration still sums to exactly nothing over a closed cycle, because a vibration is a closed book — every strand comes back to where it started, and the books balance. A charge, #150 said, needs a page torn out: a defect carried across and not brought back. This paper builds that page. In the same sheet-current model, two screw strands cross at sixty degrees — an angle where the coupling lives — and the second strand is transported straight across the interaction region, from one side to the other, and not returned. The finite-slab Nieh–Yan integral of that open history is +1.000000, in units of b², at both tube widths and on both grids. The controls behave exactly as the arithmetic says they must: the same trip out and back gives +3.8×10⁻¹⁵, the strand held still gives exactly zero, and the trip run backwards gives −1.000000. So a non-closing defect history does carry Nieh–Yan content in this model, and a closing one does not; the difference is the closure, nothing else. The paper also prints the honest limit of that sentence at full size: the value +1 is the whole transferable flux of this crossing, captured entire because the journey's endpoints sit eleven to eighteen tube-widths from the crossing, deep in the tails. What was measured is a boundary transfer in a named model over a named finite slab — not a charge of the eight, not a word about the toll, and not an event rate. The eight stays dead. What is alive is narrower and it is real: in this arithmetic, Nieh–Yan content is a property of histories that do not close.