Howling:Time Lords evolved?

It's stated in A Good Man Goes to War that the ancient Gallifreyans evolved time-sensitivity and the ability to regenerate over billions of years. Well if all Gallifreyans could regenerate and were time-sensitive, I suppose that would make all Gallifreyans Time Lords. But there are hints in the classic series that some Gallifreyans were not Time Lords, such as the Castellan and the Chancellory Guards. Furthermore, when the Castellan is shot dead in The Five Doctors, he does not regenerate, which would suggest that regeneration is by no means a natural ability of all Gallifreyans. I realise that it's of dubious reliability, as it was ultimately never produced, but Andrew Cartmel intended the character of Ace to eventually be enrolled in the Time Lord Academy by the Doctor, opening up the possibility that not all Time Lords were even from Gallifrey!! If candidates have to be naturally time-sensitive and able to regenerate, that would immedietely disqualify Ace, as she was neither of those things! I'm currently unsure how all of this can be made to fit together coherently. 213.121.200.42 09:58, August 17, 2011 (UTC)