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, x_11 is not an artist. There is at least one x_11 for which x_11 will read a book or x_11 is an artist. For all x_11, x_11 will not read a book or x_11 will write a letter. For all x_11, x_11 will play squash.
There is at least one x_11 for which x_11 is an artist or x_11 will write a letter.