Consider the following premises. There is at least one x_10 for which x_10 is a lawyer or x_10 is not a soldier. For all x_10, x_10 is a lawyer if and only if x_10 is a soldier. Can we infer the following from them? If we can, name the inference rule being used: For all x_10, the fact that x_10 were a soldier does not imply that x_10 is a lawyer.
That contradicts the premises. Therefore the answer is no.