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: Joseph is bored or Jessica is not an artist. Joseph is a server or Jessica is an artist. For all x, x is a server if and only if x is bored.
If Jessica were an artist, then Joseph is bored can be inferred via the rewriting rule. For all x, if x were a server, then x is bored can be inferred via the universal biconditional elimination rule. For all x, if x were bored, then x is a server can be inferred via the universal biconditional elimination rule.