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: Thomas is a writer. For all x_5, x_5 will sleep or x_5 is not a writer.
There is at least one x for which x is a writer can be inferred via the existential generalization rule. For all x_5, if x_5 were a writer, then x_5 is sleeping can be inferred via the universal rewriting rule.