Example 2.3.2.2. Let $\operatorname{\mathcal{C}}$ be a monoidal category and suppose that every morphism in $\operatorname{\mathcal{C}}$ is an isomorphism. Then the classifying simplicial set $B_{\bullet }\operatorname{\mathcal{C}}$ of Example 2.3.1.18 is an $\infty $-category.
$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$