What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all x_8, if x_8 were an artist, then x_8 is excited. For all x_8, x_8 is an artist. For all x_8, x_8 is a lawyer. For all x_8, if x_8 were a lawyer, then x_8 is a nurse.
For all x_8, x_8 is excited can be inferred via the universal modus ponens rule. For all x_8, x_8 is a nurse can be inferred via the universal modus ponens rule. For all x_8, x_8 is an artist and x_8 is a lawyer can be inferred via the universal conjunction rule. For all x_8, x_8 is a lawyer and x_8 is an artist can be inferred via the universal conjunction rule.