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_14, if x_14 plays squash, then x_14 is an astronaut. If it is late, then Jennifer is an astronaut. If Jennifer were an astronaut, then Barbara is writing a letter. It is late or Jennifer is playing squash.
If Jennifer were a police officer, then it is late can be inferred via the rewriting rule.