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\label{def:e1-physical-preview}
The \emph{$\Elayer{1}$ physical sector preview}
is the structural identification:
\begin{center}
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\begin{adjustbox}{max width=0.95\linewidth}
\begin{tabular}{p{0.1\linewidth}p{0.2\linewidth}p{0.2\linewidth}p{0.2\linewidth}p{0.2\linewidth}}
\toprule
\textbf{Generator}
    & \textbf{Coordinate}
    & \textbf{Sector}
    & \textbf{$\Elayer{1}$ Interaction}
    & \textbf{Structural Role} \\
\midrule
$\alpha$
    & $D$
    & $\Sector{D}$
    & Gravity
    & Radial depth (base direction) \\
$\pi$
    & $A$
    & $\Sector{A}$
    & Weak force
    & Angular winding (carrier) \\
$\gamma$
    & $B$
    & $\Sector{B}$
    & Electromagnetism
    & Exponent stratum (predicate) \\
$\eta$
    & $C$
    & $\Sector{C}$
    & Strong force
    & Tetration stratum (decoder) \\
$\omega$
    & $B \cap C$
    & $\Sector{\omega}$
    & Higgs/mass mechanism
    & $B$-$C$ crossing (coupling) \\
\bottomrule
\end{tabular}
\end{adjustbox}
\end{center}
This identification is \emph{structural}:
each force is assigned to the sector
whose categorical role matches
the force's structural function
in the standard model.