a. 不会错的, 没有错的

[ adj ]
not liable to error
<adj.all>
the Church was...theoretically inerrant and omnicompetentlack an inerrant literary sense
an unerring marksman

Inerrable \In*er"ra*ble\, a. [L. inerrabilis. See {In-} not, and
{Err}.]
Incapable of erring; infallible; unerring. ``Inerabble and
requisite conditions.'' --Sir T. Browne. ``Not an inerrable
text.'' --Gladstone.