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 y, if y were bored, then y is an artist. There is at least one y for which if y were bored, then y is an artist. For all y, if y were an artist, then y is bored.
For all y, y is bored if and only if y is an artist can be inferred via the universal biconditional introduction rule. For all y, y is an artist if and only if y is bored can be inferred via the universal biconditional introduction rule. There is at least one y for which y is bored if and only if y is an artist can be inferred via the existential biconditional introduction rule. There is at least one y for which y is an artist if and only if y is bored can be inferred via the existential biconditional introduction rule.