What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, if x_9 reads a book, then x_9 is writing a letter. For all x_9, x_9 will not write a letter. For all x_9, if x_9 makes tea, then x_9 is reading a book. For all x_9, x_9 will make tea or x_9 is a carpenter.
For all x_9, x_9 will not read a book. For all x_9, if x_9 makes tea, then x_9 is writing a letter.