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: Elisabeth is a nurse or Jennifer is not making tea. Barbara is playing tennis or Elisabeth is not a nurse. If Barbara plays tennis, then Jennifer is making tea.
If Jennifer makes tea, then Elisabeth is a nurse can be inferred via the rewriting rule. If Elisabeth were a nurse, then Barbara is playing tennis can be inferred via the rewriting rule.