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: Charles is curious. For all x_7, x_7 is curious if and only if x_7 will go running.
There is at least one x for which x is curious can be inferred via the existential generalization rule. For all x_7, if x_7 were curious, then x_7 is running can be inferred via the universal biconditional elimination rule. For all x_7, if x_7 goes running, then x_7 is curious can be inferred via the universal biconditional elimination rule.