Kerodon

$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$ $\newcommand\empty{}$
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$

Example 3.5.7.3. For $n \leq -2$, a Kan complex $X$ is $n$-truncated if and only if it is contractible (see Theorem 3.2.4.3).