Consider the following premises. If John were a musician, then Robert is making tea. It is late if and only if Robert is making tea. For all x_17, x_17 is a musician or x_17 is happy. If John were happy, then Robert is making tea. Can we infer the following from them? If we can, name the inference rule being used: Susan is a soldier.
We cannot infer that from the premises. Therefore the answer is no.