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_10, if x_10 were a carpenter, then x_10 is reading a book. Richard is a server if and only if Linda is reading a book.
If Richard were a server, then Linda is reading a book can be inferred via the biconditional elimination rule. If Linda reads a book, then Richard is a server can be inferred via the biconditional elimination rule.