What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_6 for which x_6 is a politician if and only if x_6 is an office clerk. For all x_6, if x_6 were an office clerk, then x_6 is playing squash. For all x_6, x_6 is not a politician. For all x_6, if x_6 plays squash, then x_6 is an office clerk.
For all x_6, x_6 is an office clerk if and only if x_6 will play squash. For all x_6, x_6 will play squash if and only if x_6 is an office clerk. There is at least one x_6 for which if x_6 were a politician, then x_6 is an office clerk. There is at least one x_6 for which if x_6 were an office clerk, then x_6 is a politician. There is at least one x_6 for which x_6 is not an office clerk.