What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_11, if x_11 takes a plane, then x_11 is making tea. For all x_11, x_11 will take a plane or x_11 is not happy. There is at least one x_11 for which x_11 will make tea or x_11 will not read a book. For all x_11, x_11 is happy or x_11 will read a book.
For all x_11, if x_11 were happy, then x_11 is taking a plane. There is at least one x_11 for which if x_11 reads a book, then x_11 is making tea.