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_8, x_8 is not an artist. For all x_8, x_8 is an artist if and only if x_8 is curious. Joseph is working if and only if William is curious.
If Joseph works, then William is curious can be inferred via the biconditional elimination rule. If William were curious, then Joseph is working can be inferred via the biconditional elimination rule. For all x_8, if x_8 were an artist, then x_8 is curious can be inferred via the universal biconditional elimination rule. For all x_8, if x_8 were curious, then x_8 is an artist can be inferred via the universal biconditional elimination rule. For all x_8, x_8 is not curious can be inferred via the universal biconditional elimination rule.