Sureness

Noun

1. The property of being sure, certainty.

   "His sureness was born of having looked it up in a reputable reference book."

2. The property of being sure, deft, confident of ability.

   "The surgeon's sureness was the result of long study in school and long practice in the operating room, never did he hesitate and never was there a mis-move."

3. The result or product of being sure.