Exact plateau localization

Let $Q_3$ be the incidence constructed from $J_3={\mathrm{EL}}_{\gamma }({\ell }_3)$, using the same output conversion. Let ${K_{\mathrm{ret}}}^{\mathrm{pl}}$ be the seven-row sum with $Q$ replaced by $Q_3$ and the displayed ${\sigma }_{\epsilon }(a),{\sigma }_{\epsilon }(z)$ replaced by one. No other data are changed.