What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, x_8 is excited if and only if x_8 will write a letter. For all x_8, x_8 is not excited. For all x_8, x_8 will drive a car if and only if x_8 will write a letter. For all x_8, if x_8 writes a letter, then x_8 is excited.
For all x_8, x_8 will not write a letter. For all x_8, if x_8 were excited, then x_8 is writing a letter. For all x_8, if x_8 drives a car, then x_8 is writing a letter. For all x_8, if x_8 writes a letter, then x_8 is excited. For all x_8, if x_8 writes a letter, then x_8 is driving a car. For all x_8, x_8 will not write a letter.