WASHINGTON, D.C. - Chief Justice John G. Roberts Jr. on March 31 voiced skepticism that a six-factored, non-exhaustive abstract idea test as advocated by the U.S. government would bring "clarity and certainty" to the already murky question of software patentability (Alice Corporation Pty. Ltd. v. CLS Bank International and CLS Services Ltd., No. 13-298, U.S. Sup.).