Consider the following premises. For all x_7, if x_7 were a taxi driver, then x_7 is driving a car. For all x_7, x_7 will not play a game or x_7 will read a book. For all x_7, x_7 will play a game or x_7 is a taxi driver. For all x_7, x_7 will not drive a car. Can we infer the following from them? If we can, name the inference rule being used: John is writing a letter.
We cannot infer that from the premises. Therefore the answer is no.