What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, if x_12 were a scientist, then x_12 is an artist. For all x_12, x_12 will play tennis or x_12 is not a lawyer. There is at least one x_12 for which x_12 is a scientist if and only if x_12 will play tennis.
For all x_12, if x_12 were a lawyer, then x_12 is playing tennis. There is at least one x_12 for which if x_12 were a scientist, then x_12 is playing tennis. There is at least one x_12 for which if x_12 plays tennis, then x_12 is a scientist.