(doubles: CanHaveDelta[Doubles]).+/-(delta)
(doubles: CanHaveDelta[Doubles]).+/-(delta)
(doubles: CanHaveDelta[Doubles]).+/-(delta)
(doubles: CanHaveDelta[Doubles]).+/-(delta)
(doubles: CanHaveDelta[Doubles]).n
(doubles: CanHaveDelta[Doubles]).n
(doubles: CanHaveDelta[Doubles]).n
(doubles: CanHaveDelta[Doubles]).n