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, if x_11 were curious, then x_11 is a writer. For all x_11, x_11 is curious or x_11 is a mechanic. There is at least one x_11 for which x_11 is not a writer.
There is at least one x_11 for which x_11 is not curious can be inferred via the existential modus tollens rule.