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, x_11 is excited or x_11 will read a book. For all x_11, x_11 is not excited or x_11 will listen to a song. For all x_11, x_11 will cook if and only if x_11 is bored. For all x_11, if x_11 reads a book, then x_11 is bored. For all x_11, x_11 will not cook. For all x_11, if x_11 were bored, then x_11 is reading a book.
For all x_11, x_11 will read a book or x_11 will listen to a song can be inferred via the universal resolution rule. For all x_11, x_11 will read a book if and only if x_11 is bored can be inferred via the universal biconditional introduction rule. For all x_11, x_11 is bored if and only if x_11 will read a book can be inferred via the universal biconditional introduction rule. For all x_11, if x_11 cooks, then x_11 is bored can be inferred via the universal biconditional elimination rule. For all x_11, if x_11 were bored, then x_11 is cooking can be inferred via the universal biconditional elimination rule. For all x_11, x_11 is not bored can be inferred via the universal biconditional elimination rule.