What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, if y were an office clerk, then y is reading a book. For all y, if y reads a book, then y is running. For all y, y is an office clerk or y is not a police officer.
For all y, if y were an office clerk, then y is running. For all y, if y were a police officer, then y is an office clerk.