Exercise 10.3.2.3. Let $\operatorname{\mathcal{C}}$ be an $\infty $-category. Show that every isomorphism in $\operatorname{\mathcal{C}}$ is a quotient morphism (see Example 10.3.4.3 for a stronger statement).
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$