What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_10, if x_10 plays squash, then x_10 is a lawyer. If Joseph were a police officer, then James is a lawyer. James is playing squash or Joseph is a police officer. For all x_10, if x_10 were a lawyer, then x_10 is playing squash.
For all x_10, x_10 will play squash if and only if x_10 is a lawyer. For all x_10, x_10 is a lawyer if and only if x_10 will play squash.