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, x_12 will sleep if and only if x_12 will read a book. Mary is a mechanic or Jennifer is not sleeping. Mary is not a mechanic.
Jennifer is not sleeping. If Jennifer sleeps, then Mary is a mechanic. For all x_12, if x_12 sleeps, then x_12 is reading a book. For all x_12, if x_12 reads a book, then x_12 is sleeping.