\begin{table}%t2 %\centering \par \caption {\label{interp}Theoretical interpretations of observed features and consequences for helium in CRUMP stars. %dilution factor, ISM the interstellar medium. } { %\centering \par \begin{tabular}{clllc} \hline \hline \noalign{\smallskip} $N$ & Observed feature & Hypothesis & Theoretical interpretation & He-rich \\ \hline \\[-2mm] 1 &$\epsilon$(Li) $<$ Spite & no in-situ depl. & $D < \sim 0.5$ & YES \\ & & & & \\ 2 &$\epsilon$(Li) $<$ Spite & strong in-situ depl. & $D > 1$ & YES for $D< \sim 4$ \\ & & & & \\ 3 &$\epsilon$(Li) $\sim$ Spite & & $D > 1$, in situ Li- depletion & YES for $D< \sim 4$ \\ & & & & \\ & & & & \\ 4 & $^{12}$C/ $^{13}$C $<$ ISM & & H- and He-burn. and no He-only & ? \\ 5 & $^{12}$C/ $^{13}$C $>$ ISM & & H- and He-burn. plus He-only, $D \gg 1$ & NO \\ & & & & \\ 6 & [N/H] $>$ 1.4+[Fe/H] & 0 $\le$ ISM [CNO/Fe]~$\le$~0.6 & source material is primary N rich & ? \\ & & & & \\ 7 & [N/C] and [N/O]~$>$~0 & & H- and He-burn. and no He-only & ? \\ 8 & [N/C] and [N/O]~$<$~0 & & H- and He-burn. plus He-only, $D \gg 1$ & NO \\ & & & & \\ 9& [Na/Ne] and [Al/Mg]~$>$~0 & & H- and He-burn. and no He-only, small $D$ & YES \\ 10& [Na/Ne] and [Al/Mg]~$<$~0 & & H- and He-burn. plus He-only, $D \gg 1$ & NO \\ & & & & \\ 11& [Al/Fe]~$>$~0 & ISM [Mg/Fe] $\sim$ 0 & H- and He-burn. & ? \\ 12&[Al/Fe]~$<$~0 & & [Al/Fe]~$<$~0 in $M_{\rm source}$, $D \gg 1$ & NO \\ \hline \end{tabular} } \vspace*{2mm} \end{table}