Trivial weak equivalences and all morphisms as fibrations

Example 2.2.5. Let \(C\) be an \(\infty \)-category that admits a terminal object and admits all pullbacks. Then we may turn \(C\) into an \(\infty \)-category with weak equivalences and fibrations by taking \(W\) to consist only of the isomorphisms and \(F\) to consist of all morphisms in \(C\).