Definition: Two different plateaux

On $U_0⋐U$, an output plateau means $g=1$ near the $y$-projection of ${\overline{U}}_0$. A response plateau additionally means $g=1$ near the $b$-projection of ${\overline{U}}_0$. The first removes output-switch derivatives; the second simplifies root weights at $b$. Neither changes $F={E_m}^{\mathrm{A}}f$.