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: There is at least one y for which y will go running. For all y, y is a doctor. For all y, y will make tea or y is not a doctor.
There is at least one y for which y will go running and y is a doctor can be inferred via the existential conjunction rule. Some doctors will go running can be inferred via the existential conjunction rule. For all y, if y were a doctor, then y is making tea can be inferred via the universal rewriting rule.