What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_10, if x_10 reads a book, then x_10 is excited. For all x_10, if x_10 were excited, then x_10 is reading a book. For all x_10, if x_10 plays squash, then x_10 is excited. There is at least one x_10 for which x_10 will read a book or x_10 will play squash. For all x_10, if x_10 were excited, then x_10 is playing squash.
For all x_10, if x_10 reads a book, then x_10 is playing squash. For all x_10, if x_10 plays squash, then x_10 is reading a book. There is at least one x_10 for which x_10 is excited. For all x_10, x_10 will read a book if and only if x_10 is excited. For all x_10, x_10 is excited if and only if x_10 will read a book. For all x_10, x_10 will play squash if and only if x_10 is excited. For all x_10, x_10 is excited if and only if x_10 will play squash.