Consider the following premises. For all x, x is a lawyer if and only if x will cook. For all x, if x cooks, then x is fast. There is at least one x for which if x were fast, then x is sleeping. Can we infer the following from them? If we can, name the inference rule being used: For all x, the fact that x were a lawyer does not imply that x is sleeping.
That contradicts the premises. Therefore the answer is no.