Remark 5.1.4.9. In the statement of Proposition 5.1.4.8, the hypothesis that $\operatorname{\mathcal{C}}$ and $\operatorname{\mathcal{D}}$ are $\infty $-categories is superfluous: we will later show that every cartesian fibration of simplicial sets is an isofibration (Corollary 5.7.7.5).

$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$