What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all x_11, x_11 will sleep or x_11 is not an artist. Susan is an artist.
There is at least one x for which x is an artist can be inferred via the existential generalization rule. For all x_11, if x_11 were an artist, then x_11 is sleeping can be inferred via the universal rewriting rule.