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: Karen is not running. For all y_1, y_1 is happy if and only if y_1 will go running. For all y_1, if y_1 were happy, then y_1 is running.
For all y_1, if y_1 were happy, then y_1 is running can be inferred via the universal biconditional elimination rule. For all y_1, if y_1 goes running, then y_1 is happy can be inferred via the universal biconditional elimination rule.