unnecessariness

noun

1. (uncountable)The state or characteristic of being unnecessary.

   “The unavoidableness of which effects hath carried some of their Casuists into an opinion, of the unnecessariness of devotion in these holy businesses: so as one says . . . "Though it be convenient, that the Communicant should have actual devotion; yet, it is not necessary."”

   “A disciplined brain will at once show the unnecessariness of most ambitions, and will ensure that the remainder shall be conducted with reason.”

   “In the sad case of Paris Hilton, whose sheer unnecessariness epitomizes her career, her unnecessary accessory of choice is an SUV.”