Source : Webster's Revised Unabridged Dictionary (1913)

Affirmable \Af*firm"a*ble\, a.
   Capable of being affirmed, asserted, or declared; -- followed
   by of; as, an attribute affirmable of every just man.

Source : WordNet®

affirmable
     adj : capable of being affirmed or asserted; "a quality affirmable
           of every member of the family" [syn: {assertable}]