What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_3, if x_3 were a mechanic, then x_3 is reading a book. There is at least one x_3 for which x_3 is a mechanic or x_3 will not read a book.
There is at least one x_3 for which if x_3 reads a book, then x_3 is a mechanic.