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 y, y will play tennis or y is a police officer. For all y, y will not play tennis or y will read a book. For all y, if y reads a book, then y is running. For all y, y is a police officer if and only if y will go running.
For all y, y is a police officer or y will read a book can be inferred via the universal resolution rule. For all y, if y were a police officer, then y is running can be inferred via the universal biconditional elimination rule. For all y, if y goes running, then y is a police officer can be inferred via the universal biconditional elimination rule.