What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_13 for which x_13 will read a book. For all x_13, x_13 is a poet or x_13 is a scientist. For all x_13, x_13 is not a poet.
For all x_13, x_13 is a scientist.