What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 were a bartender, then x_6 is making tea. For all x_6, x_6 is not a cashier or x_6 will read a book. For all x_6, x_6 will take a plane. For all x_6, x_6 is a cashier or x_6 is a bartender. For all x_6, if x_6 reads a book, then x_6 is making tea.
For all x_6, x_6 is a bartender or x_6 will read a book.