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: Barbara is a scientist if and only if William is reading a book. For all x_14, x_14 is a scientist.
If Barbara were a scientist, then William is reading a book can be inferred via the biconditional elimination rule. If William reads a book, then Barbara is a scientist can be inferred via the biconditional elimination rule.