Consider the following premises. Michael is a bartender or Patricia is driving a car. If Michael were a bartender, then John is a police officer. John is a police officer if and only if Jennifer is writing a letter. If Patricia drives a car, then Jennifer is writing a letter. Can we infer the following from them? If we can, name the inference rule being used: Elisabeth is fast.
We cannot infer that from the premises. Therefore the answer is no.