Truncation notation for t-structures

Warning 6.3.11. The notation \(\tau _{\leq n}\) is sometimes also used for the notion of \(n\)-truncation in an \(\infty \)-category. This notation is not compatible with the left adjoint \(\tau _{\leq n}\) from the lemma. In fact, the only \(n\)-truncated object in a stable \(\infty \)-category is the zero object. (Compare Lemma 6.3.18.)