Warning 4.4.3.24. The conclusion of Proposition 4.4.3.22 generally does not hold if $X$ is not a Kan complex.
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
Warning 4.4.3.24. The conclusion of Proposition 4.4.3.22 generally does not hold if $X$ is not a Kan complex.