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