Strangely enough, dwarves can be even assassins, but not knights. Also minotaurs who are concerned about glory, don't have any chances to become knights. What do you think?
Let me remind you that pre-spec state means the state knights had before they were granted 2/3 weapon specializations. That meant they were divided into Paladine (vengeance, sanctuary, holy prayer) and Kiri-Jolith (wrath, frenzy, lightshield, protectorate, spike) ones, had locate and curative spells, and had useful (should be read 'more powerful') charge set skill.