In 'Wings of Fire,' Dr. Abdul Kalam expounds on the necessity of the boundary of human aspiration. This boundary or the furthest extent to which ambition can be ____ (1)____ must be explicitly articulated. The operation of the mission wouldn't be ____ (2)____ without contemplation of this boundary. This process validates the precision and repeatability of the mission, the key to ____ (3)____ for any scientific pursuit.