Example 3.5.3.2. Let $n$ be a negative integer. Then a simplicial set $X$ is $n$-coskeletal if and only if it is a final object of $\operatorname{Set_{\Delta }}$: that is, if and only if it is isomorphic to the standard $0$-simplex $\Delta ^0$.
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$