Judging from what I know/think how the game engine works, I would say : 89,7% sure he does.
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As for AI the most effective work around to this problem so far is to simply use an American instead, they tend to put up a bit more of a fight than your average Artificial Idiot. ... James McGuigan on rec.games.computer.stars somewhen back in 1998 ...
I think Arralen is right, ratio up to 89.8 %
More seriously, I suppose (rationnally) that the dom spreading effect from Pretender and Prophet comes from their respective special tags, unaffected by Feeblemind.
OTOH a feebleminded prophet can't preach anymore as he has no mora any priest level !