The Evangelical position has been criticized as being circular by non-Christians and as well as Christians such as Catholic and Orthodox authors, who accept the doctrine of biblical inspiration but reject the Protestant arguments in favor of it. These critics claim that the Bible can only be used to prove doctrines of biblical inspiration if the doctrine is assumed to begin with. Some defenders of the evangelical doctrine such as B. B. Warfield and Charles Hodge, however, moved away from such circular arguments and "committed themselves to the legitimacy of external verification" to inductively prove the doctrine, though they placed some restrictions on the evidences that could be considered.