What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_4, x_4 is not an electrician or x_4 will read a book. For all x_4, x_4 will not take a plane or x_4 is a mechanic. For all x_4, if x_4 reads a book, then x_4 is making tea. For all x_4, if x_4 were a mechanic, then x_4 is making tea. For all x_4, x_4 is an electrician or x_4 will take a plane.
For all x_4, x_4 will take a plane or x_4 will read a book.