Consider the following premises. For all x_5, x_5 will play a game if and only if x_5 is a lawyer. There is at least one x_5 for which if x_5 were a lawyer, then x_5 is playing a game. Can we infer the following from them? If we can, name the inference rule being used: For all x_5, the fact that x_5 plays a game does not imply that x_5 is a lawyer.
That contradicts the premises. Therefore the answer is no.