The Collaborative International Dictionary
Ascertainableness
Ascertainable \As`cer*tain"a*ble\, a. That may be ascertained. -- As`cer*tain"a*ble*ness, n. -- As`cer*tain"a*bly, adv.
Wiktionary
ascertainableness
n. The state or quality of being ascertainable.