The Collaborative International Dictionary
Inerrableness
Inerrableness \In*er"ra*ble*ness\
([i^]n*[e^]r"r[.a]*b'l*n[e^]s), n.
Exemption from error; inerrability; infallibility.
--Hammond.
Wiktionary
inerrableness
n. Exemption from error; infallibility.