\begin{table}[tbp]
\centering
\small
\caption{Mitigations on a shared \texttt{fp32} fault grid pooled over scenes. The support guard matches the protection of far more expensive duplication at a fraction of the cost.}
\label{tab:mitigation}
\begin{tabular}{lrrl}
\toprule
Defense & catastrophe (\%) & mean foot.\,(\%) & cost \\
\midrule
none & 0.552 & 0.0880 & 0 \\
support guard & 0.052 & 0.0035 & 1$\times$ mem, $\sim$0.1 ms/frame \\
selective guard & 0.156 & 0.0035 & 1$\times$ mem, $<$0.1 ms/frame \\
ECC sign+exp & 0.000 & 0.0002 & $\sim$1.3$\times$ mem, parity \\
full duplication & 0.000 & 0.0000 & 3$\times$ mem, voting \\
\bottomrule
\end{tabular}
\end{table}